HP ZBook 14u G5 Mobile Workstation
Maintenance and Service Guide
© Copyright 2018 HP Development Company,
L.P.
AMD and AMD Radeon are trademarks of
Advanced Micro Devices, Inc. Bluetooth is a
trademark owned by its proprietor and used by
HP Inc. under license. Intel and Core are
trademarks of Intel Corporation in the U.S. and
other countries. Microsoft and Windows are
trademarks of the Microsoft group of
companies.
The information contained herein is subject to
change without notice. The only warranties for
HP products and services are set forth in the
express warranty statements accompanying
such products and services. Nothing herein
should be construed as constituting an
additional warranty. HP shall not be liable for
technical or editorial errors or omissions
contained herein.
First Edition: February 2018
Document Part Number: L12980-001
Product notice
This user guide describes features that are
common to most models. Some features may
not be available on your computer.
Not all features are available in all editions of
Windows. This computer may require upgraded
and/or separately purchased hardware, drivers
and/or software to take full advantage of
Windows functionality. Go to
http://www.microsoft.com for details.
Software terms
By installing, copying, downloading, or
otherwise using any software product
preinstalled on this computer, you agree to be
bound by the terms of the HP End User License
Agreement (EULA). If you do not accept these
license terms, your sole remedy is to return the
entire unused product (hardware and software)
within 14 days for a full refund subject to the
refund policy of your seller.
For any further information or to request a full
refund of the price of the computer, please
contact your seller.
Important Notice about Customer Self-Repair Parts
CAUTION: Your computer includes Customer Self-Repair parts and parts that should only be accessed by an
authorized service provider. See Chapter 5, "Removal and replacement procedures for Customer Self-Repair
parts," for details. Accessing parts described in Chapter 6, "Removal and replacement procedures for
Authorized Service Provider only parts," can damage the computer or void your warranty.
iii
iv Important Notice about Customer Self-Repair Parts
Safety warning notice
WARNING! To reduce the possibility of heat-related injuries or of overheating the device, do not place the
device directly on your lap or obstruct the device air vents. Use the device only on a hard, at surface. Do not
allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or
clothing, to block airow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as
pillows or rugs or clothing, during operation. The device and the AC adapter comply with the user-accessible
surface temperature limits dened by the International Standard for Safety of Information Technology
Equipment (IEC 60950-1).
v
vi Safety warning notice
Table of contents
1 Product description ....................................................................................................................................... 1
2 Components .................................................................................................................................................. 7
Right ....................................................................................................................................................................... 7
Left ......................................................................................................................................................................... 9
Display ................................................................................................................................................................. 10
Keyboard area ...................................................................................................................................................... 12
TouchPad ........................................................................................................................................... 12
Lights ................................................................................................................................................. 13
Buttons, speakers, and ngerprint reader ........................................................................................ 15
Special keys ....................................................................................................................................... 16
Action keys ........................................................................................................................................ 17
Hot keys (select products only) ......................................................................................................... 18
Bottom ................................................................................................................................................................. 19
Front ..................................................................................................................................................................... 20
Cover .................................................................................................................................................................... 21
Labels ................................................................................................................................................................... 22
3 Illustrated parts catalog .............................................................................................................................. 24
Computer major components .............................................................................................................................. 24
Cable Kit ............................................................................................................................................................... 27
Display assembly subcomponents ...................................................................................................................... 28
Plastics Kit ........................................................................................................................................................... 30
Miscellaneous parts ............................................................................................................................................. 30
4 Removal and replacement procedures preliminary requirements .................................................................... 31
Tools required ...................................................................................................................................................... 31
Service considerations ......................................................................................................................................... 31
Plastic parts ....................................................................................................................................... 31
Cables and connectors ...................................................................................................................... 32
Drive handling ................................................................................................................................... 32
Grounding guidelines ........................................................................................................................................... 33
Electrostatic discharge damage ........................................................................................................ 33
Packaging and transporting guidelines .......................................................................... 34
Workstation guidelines ................................................................................................... 34
Equipment guidelines ..................................................................................................... 35
vii
5 Removal and replacement procedures for Customer Self-Repair parts ............................................................. 36
Component replacement procedures .................................................................................................................. 36
Bottom cover ..................................................................................................................................... 36
Solid-state drive (SSD) ...................................................................................................................... 38
Memory modules ............................................................................................................................... 39
WLAN/Bluetooth combo card ............................................................................................................ 41
WWAN module ................................................................................................................................... 43
Keyboard ........................................................................................................................................... 45
6 Removal and replacement procedures for Authorized Service Provider parts ................................................... 48
Component replacement procedures .................................................................................................................. 48
Battery ............................................................................................................................................... 49
Heat sink assembly ........................................................................................................................... 51
RTC battery ........................................................................................................................................ 54
USB board .......................................................................................................................................... 55
RJ-45 board with bracket .................................................................................................................. 56
Power button board .......................................................................................................................... 57
Speaker assembly ............................................................................................................................. 58
Fingerprint reader assembly ............................................................................................................. 59
TouchPad ........................................................................................................................................... 60
TouchPad button board ..................................................................................................................... 62
NFC module ....................................................................................................................................... 63
Smart card reader .............................................................................................................................. 64
Fan ..................................................................................................................................................... 65
System board .................................................................................................................................... 67
Display assembly ............................................................................................................................... 71
Top cover ........................................................................................................................................... 81
7 Interpreting system validation diagnostic front panel LEDs and audible codes ................................................. 82
8 Troubleshooting guide ................................................................................................................................. 84
Resources ............................................................................................................................................................. 85
General troubleshooting steps ............................................................................................................................ 85
Identify the issue ............................................................................................................................... 86
1. Understand the issue .................................................................................................. 86
Boot up sequence ......................................................................................... 86
Failure classication ..................................................................................... 86
2. Examine the environment .......................................................................................... 88
3. Perform a visual inspection of hardware ................................................................... 89
4. Update BIOS and drivers ............................................................................................. 89
viii
Manually updating BIOS and drivers ............................................................ 89
Remotely deploying BIOS and drivers .......................................................... 89
Analyze the issue ............................................................................................................................... 89
5. Remove or uninstall recently added hardware, software .......................................... 89
6. HP Hardware Diagnostics and Tools ........................................................................... 90
HP PC Hardware Diagnostics (UEFI) ............................................................. 90
HP Support Assistant (HPSA) ....................................................................... 92
HP BIOS Conguration Utility (BCU) ............................................................. 93
HP Image Diagnostic Tool ............................................................................. 93
HP Thermal Monitor ..................................................................................... 93
Non HP diagnostics tools ............................................................................. 93
7. Status lights, blinking light codes, troubleshooting lights, and POST error
messages ........................................................................................................................ 94
Status lights .................................................................................................. 94
Blinking light codes ...................................................................................... 95
POST error messages ................................................................................... 95
Power Good (Troubleshooting) lights .......................................................... 96
Resolve the issue ............................................................................................................................... 97
8. Hard reset .................................................................................................................... 97
9. Soft reset (Default Settings) ....................................................................................... 98
10. Reseat cables and connections ................................................................................ 98
11. Test with minimum conguration ............................................................................ 99
Essential hardware conguration ................................................................ 99
Safe mode ................................................................................................... 100
12. Test with veried working conguration (hardware and/or operating system) ... 100
13. Replace the system board ...................................................................................... 100
Verify solution ................................................................................................................................. 101
Helpful Hints ...................................................................................................................................................... 101
At startup ........................................................................................................................................ 102
During operation ............................................................................................................................. 102
Consulting with HP Service ............................................................................................................. 103
Common issues and possible solutions ............................................................................................................ 103
Power-on issues .............................................................................................................................. 103
No Power ....................................................................................................................... 103
Intermittent power-on, shutdown, reboot ................................................................... 105
AC adapter issue ........................................................................................................... 107
Battery not recognized, not charging ........................................................................... 107
Battery discharges too fast .......................................................................................... 109
Burnt smell .................................................................................................................... 110
POST ................................................................................................................................................ 110
No video (with power) ................................................................................................... 110
ix
Blinking lights ............................................................................................................... 111
Diagnostics error messages ......................................................................................... 112
BIOS password .............................................................................................................. 113
Performance (OS) ............................................................................................................................ 113
Intermittent shutdown ................................................................................................. 114
Blue screen .................................................................................................................... 115
Freeze at Windows Logo (hang/lockup) ....................................................................... 117
Electromagnetic Interference (EMI) .............................................................................. 118
No wake up .................................................................................................................... 119
Unresponsive ................................................................................................................ 120
Slow performance ......................................................................................................... 120
HP Smart Adapter warning message ........................................................................... 121
Incorrect time and date ................................................................................................ 121
Display ............................................................................................................................................. 122
Display anomalies ......................................................................................................... 122
Symptom .................................................................................................... 122
Quick check ................................................................................................. 123
HP PC Hardware Diagnostics (UEFI) for video test ..................................... 123
Display assembly diagram ......................................................................... 124
Dead pixel ..................................................................................................................... 124
No video (internal) ........................................................................................................ 124
No video (external) ....................................................................................................... 125
DisplayPort/VGA ........................................................................................................... 125
HDMI .............................................................................................................................. 125
No or bad external video via docking ........................................................................... 126
Incorrect or missing color/distorted image .................................................................. 126
Touch screen ................................................................................................................. 127
I/O devices ....................................................................................................................................... 128
Keyboard ....................................................................................................................... 128
Keyboard point stick ..................................................................................................... 129
Keyboard backlight ....................................................................................................... 129
TouchPad ....................................................................................................................... 130
Network Connectivity Ethernet (RJ-45 jack) ................................................................ 130
Network connectivity wireless (WLAN) ........................................................................ 131
WWAN ............................................................................................................................ 132
USB ................................................................................................................................ 133
Smart card reader ......................................................................................................... 134
Speaker, headphone - audio issues .............................................................................. 135
Thunderbolt (TB) ........................................................................................................... 136
Storage ............................................................................................................................................ 137
Hard drive/solid-state drive not recognized ................................................................ 138
x
No boot to operating system (no read/write error) ..................................................... 138
Read-write error ........................................................................................................... 139
Slow performance ......................................................................................................... 139
Blue screen (BSOD) error .............................................................................................. 139
Noisy hard drive ............................................................................................................ 140
Mechanical ....................................................................................................................................... 141
Fan error message - 90B .............................................................................................. 141
Noise (sound) ................................................................................................................ 142
Fan runs constantly ...................................................................................................... 143
Thermal shutdown (hot) ............................................................................................... 144
Stuck power button ...................................................................................................... 144
Additional information ...................................................................................................................................... 146
Acronyms ......................................................................................................................................... 146
Blinking lights and boot error codes ............................................................................................... 147
Processor not executing code ...................................................................................... 147
BIOS recovery code unable to nd valid BIOS recovery image ..................................... 147
Memory module error ................................................................................................... 147
Graphics Controller Error (No Controller) ..................................................................... 148
Failure - System Board Error ........................................................................................ 148
Intel Trusted Execution Technology (TXT) Error .......................................................... 148
Sure Start unable to nd valid BIOS Boot Block image ................................................ 148
Sure Start has identied a problem (Manual Recovery Policy Set) .............................. 149
POST Error Messages and User Actions .......................................................................................... 149
Routine Maintenance for Performance Improvement .................................................................... 152
Common Blue Screen Error Messages ............................................................................................ 152
Error message list ......................................................................................................... 152
Bug check symbolic names ........................................................................................... 152
Microsoft general troubleshooting of Windows bug check codes ............................... 153
Use Windows Debugging Tool ......................................................................................................... 153
Windows Software Development Kit (SDK) .................................................................. 154
Display Issue: Pixel Anomalies ........................................................................................................ 158
Cable management ......................................................................................................................... 159
Connector types .............................................................................................................................. 160
9 Computer Setup (BIOS), TPM, and HP Sure Start ........................................................................................... 162
Using Computer Setup ....................................................................................................................................... 162
Starting Computer Setup ................................................................................................................ 162
Using a USB keyboard or USB mouse to start Computer Setup (BIOS) ........................ 162
Navigating and selecting in Computer Setup ................................................................................. 162
Restoring factory settings in Computer Setup ............................................................................... 163
Updating the BIOS ........................................................................................................................... 163
xi
Determining the BIOS version ...................................................................................... 163
Downloading a BIOS update ......................................................................................... 164
Changing the boot order using the f9 prompt ................................................................................ 165
TPM BIOS settings (select products only) ......................................................................................................... 165
Using HP Sure Start (select products only) ....................................................................................................... 165
10 Using HP PC Hardware Diagnostics (UEFI) ................................................................................................... 166
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 166
11 Backing up, restoring, and recovering ........................................................................................................ 168
Creating recovery media and backups .............................................................................................................. 168
Using HP Recovery media (select products only) ........................................................................... 168
Using Windows tools ....................................................................................................................... 169
Using the HP Cloud Recovery Download Tool (select products only) ............................................. 170
Restore and recovery ......................................................................................................................................... 170
Recovering using HP Recovery Manager ........................................................................................ 170
What you need to know before you get started ........................................................... 170
Using the HP Recovery partition (select products only) .............................................. 171
Using HP Recovery media to recover ............................................................................ 172
Changing the computer boot order .............................................................................. 172
Removing the HP Recovery partition (select products only) ....................................... 172
12 Specications .......................................................................................................................................... 173
Computer specications .................................................................................................................................... 173
35.6-cm (14.0-in) display specications .......................................................................................................... 174
M.2 PCIe solid-state drive specications .......................................................................................................... 175
M.2 SATA solid-state drive specications ......................................................................................................... 176
13 Power cord set requirements .................................................................................................................... 177
Requirements for all countries .......................................................................................................................... 177
Requirements for specic countries and regions ............................................................................................. 177
14 Statement of memory volatility ................................................................................................................ 179
Nonvolatile memory usage ............................................................................................................................... 181
Questions and answers ..................................................................................................................................... 183
Using HP Sure Start (select models only) .......................................................................................................... 184
15 Recycling ................................................................................................................................................ 185
Index ........................................................................................................................................................... 186
xii
1 Product description
Category Description
Product Name HP ZBook 14u G5 Mobile Workstation
Processors 8th-generation Intel® Core™ quad-core processors:
Intel Core i7-8650U
Intel Core i7-8550U
Intel Core i5-8350U
Intel Core i5-8250U
7th-generation Intel Core dual-core processors:
Intel Core i5-7300U
Intel Core i5-7200U
Chipset Integrated with processor
Graphics Internal graphics:
Intel HD Graphics 620
External graphics:
AMD Radeon Pro WX3100, 2 GB
Both UMA and discrete congurations support three independent displays through docking stations as follows:
●
HP Docking Station - maximum resolution = 2.5K @60Hz (DisplayPort 1) and 2.5K @60Hz (DisplayPort 2)
●
HP Thunderbolt 3 Dock - maximum resolution = 4K @60Hz (DP1) and 4K @60Hz (DisplayPort 2)
●
HP Thunderbolt Dock 120W or 230W G2 - maximum resolution = 4K @60Hz (DisplayPort 1) and 4K @60Hz
(DisplayPort 2) with Thunderbolt
Panel Supports privacy lter and narrow bezel
35.6-cm (14.0-in), UWVA, non-touch:
Full high-denition (FHD)(1920×1080), anti glare (AG), 220 nits, 45% CG, eDP, slim, without camera
FHD (1920×1080), anti glare (AG), 220 nits, 45% CG, eDP ,slim, with HD camera
FHD (1920×1080), anti glare (AG), 220 nits, 45% CG, eDP ,slim, with HD+IR camera
FHD (1920×1080), anti glare (AG), 220 nits, 45% CG, eDP ,slim, without camera, with WWAN
FHD (1920×1080), anti glare (AG), 220 nits, 45% CG, eDP ,slim, with HD camera, with WWAN
FHD (1920×1080), anti glare (AG), 220 nits, 45% CG, eDP ,slim, with HD+IR camera, with WWAN
FHD (1920×1080), anti glare (AG), 400 nits, 72% CG, eDP+PSR ,slim, Ambient Light Sensor, with HD+IR camera
FHD (1920×1080), anti glare (AG), 400 nits, 72% CG, eDP+PSR ,slim, Ambient Light Sensor, with HD+IR camera,
with WWAN
1
Category Description
Ultra high denition (UHD)/4K (3840x2160), anti glare (AG), 400 nits, 72% CG, eDP+PSR ,ultra slim, Ambient Light
Sensor, with HD+IR camera, with WWAN
35.6-cm (14.0-in), UWVA, touch screen:
FHD (1920×1080), 220 nits, 45% CG, eDP ,slim, with HD+IR camera
FHD (1920×1080), 220 nits, 45% CG, eDP ,slim, with HD+IR camera, with WWAN
FHD (1920×1080), 700 nits, 72% CG, eDP+PSR, ultra slim, anti-glare (AG), Privacy, with HD+IR camera, with
WWAN
Memory Two memory module slots
Memory is customer accessible/upgradeable
DDR4-2400 dual channel support (8th generation processors)
DDR4-2133 dual channel support (7th generation processors)
Supports up to 32 GB of system RAM in the following congurations:
●
32768 MB (16384 MB×2)
●
24576 MB (16384 MB×1 + 8192 MB×1)
●
20480 MB (16384 MB×1 + 4096 MB×1)
●
16384 MB (16384 MB×1 or 8192 MB×2)
●
12288 MB (8192 MB×1 + 4096 MB×1)
●
8192 MB (8192 MB×1 or 4096 MB×2)
●
4096 MB (4096 MB×1)
Primary storage M.2 solid-state drives (2280):
1 TB, PCIe, Gen3×4, SS/DS, NVMe, TLC
1 TB, PCIe, Gen3×4, SS, NVMe, MLC
512 GB, PCIe, Gen3×4, SS, NVMe, TLC, Opal 2
512 GB, PCIe, Gen3×4, SS, NVMe, TLC
512 GB, PCIe, Gen3×4, SS, NVMe, MLC
512 GB, SATA-3, SS, TLC, FIPS-140-2
256 GB, PCIe, Gen3×4, NVMe, SS, TLC
256 GB, PCIe, Gen3×4, NVMe, SS, MLC
256 GB, PCIe, Gen3×4, SS, TLC, Opal 2
128 GB, SATA-3, SS, TLC
Audio and video Multi-array microphone (including World-Facing 3rd microphone)
Stereo speakers (2)(13mm × 38mm × 4mm)
Webcam HD RGB 720p
Webcam HD+IR RGB 720p
Camera privacy shutter (only with non-touch camera panels)
2 Chapter 1 Product description
Category Description
Supports WDR (Wide Dynamic Range)
Support for models without camera
Ethernet Intel Ethernet Connection I219-LM 10/100/1000 (vPro)
Intel Ethernet Connection I219-V 10/100/1000 (non-vPro)
S3/S4/S5 Wake-on-LAN
*The following support S3/S4/S5 wake on LAN/HBMA (via out of band): embedded NIC, HP Elite USB-C Dock G3,
HP USB-C Dock G4, HP USB-C Universal Dock, HP Thunderbolt Dock 120W/230W G2, and HP USB-C Mini Dock.
*The following support S3 wake on LAN/HBMA (via Windows operating system): HP Thunderbolt 3 Dock, HP Elite
USB-C Docking Station G2, HP USB-C Travel Dock, and HP USB Travel Dock.
Wireless
networking
WPAN Bluetooth:
Integrated wireless personal area network (PAN) supported by Bluetooth® 4.2 combo card
Wireless local area network (WLAN):
Integrated WLAN options with dual antennas (M.2 2230 socket PCIe/USB)
Supports the following WLAN formats:
●
Intel Dual band wireless-AC 8265 802.11ac 2×2 WiFi + Bluetooth 4.2 Combo Adaptor (vPro)
●
Intel Dual band wireless-AC 8265 802.11ac 2×2 WiFi + Bluetooth 4.2 Combo Adaptor (non-vPro)
●
Realtek RTL8822BE 802.11ac 2×2 Wi-Fi + Bluetooth 4.2 Combo Adapter
Two WLAN antennas built into bottom of display assembly
Support for models without WLAN
Compatible with Miracast-certied devices
Bluetooth Disabled IOPT
Support S3/S4 wake on Wireless LAN
Supports WLAN/LAN/WWAN switching
Support for HP Sure Connect with Client Side Load Balancing
Near-Field Communication (NFC):
NXP NPC300 Near Field Communication Module (NFC Mirage WNC XRAV-1 [NXP NPC300 I2C 10 mm x 17 mm])
NFC antenna
Support for models without NFC
Wireless wide area network (WLAN):
Integrated wireless wide area network (WWAN) options by way of wireless module
Two WWAN antennas (world wide 5 band, congured at top of display panel)
Supports the following WWAN formats:
●
LTE CAT4: Huawei HP lt4132, LTE/HSPA+ w/GPS M.2
●
LTE CAT9: Fibocom Intel XMM 7360 LTE-Advanced
WWAN modules are compatible with a programmable removable eSIM
3
Category Description
Support for models without WWAN
Support for WWAN after market option (AMO)
Ports USB Type-C (Thunderbolt)
USB 3.1 Gen 1 port
USB 3.1 Gen 1 charging port
HDMI 1.4
RJ-45/Ethernet
Docking connector
Audio-out (headphone)/audio-in (microphone) combo jack
AC port
Docking HP Thunderbolt Dock 120W G2
HP Thunderbolt Dock 230W G2
HP Thunderbolt 3 Dock
HP Docking Station
Keyboard/
pointing devices
Power
requirements
Keyboard:
HP Collaboration Keyboard
●
Dual point, non-backlit, spill resistant with drain
●
Dual point, backlit, spill resistant with drain, with HP Dura Keys
●
Dual point, backlit, spill resistant with drain, with HP Dura Keys – Privacy
TouchPad:
Support for Microsoft Precison Touchpad Default Gestures
Firmware PTP (Point to Point) with Filter Driver
Support for ‘No Hybrid Mode’
Battery:
HP Long Life Lithium Polymer Soft Pack Battery, 3-cell, 50 WHr
HP Fast Charge Technology
AC adapter:
65 W “Smart” right angle, 4.5 mm
65 W “Smart” right angle, 4.5 mm - Argentina
65 W “Smart” right angle, 4.5 mm - EM
65 W Straight USB Type C
45 W “Smart” right angle, 4.5 mm
45 W “Smart” right angle, 4.5 mm - Argentina
45 W “Smart” right angle, 4.5 mm, 2-prong (Japan only)
4 Chapter 1 Product description
Category Description
45 W Straight USB Type C
Power cord:
2 wire plug (C7), 1 m
3 wire plug (C5), 1 m
Duckhead power cord (C5) 1.0 m
Duckhead power cord (C5)
Security Security lock
Trusted Platform Module (TPM) 2.0 (Inneon, soldered down)
Touch ngerprint sensor (landed, touch with 8x8 sensor)
Support for models without a ngerprint reader
Smart Card reader (active)
Support for models without a Smart Card reader
Preboot authentication (password, smart card)
Hardware enforced Firmware Protection: HP Hardware Root of Trust + Sure Start Gen4
Operating system Preinstalled:
Windows 10 Home 64 High End Chinese Market CPPP
Windows 10 Home 64 Plus
Windows 10 Home 64 Plus Single Language
Windows 10 Professional 64
Windows 10 Home 64 StF MSNA Standard
Windows 10 Home 64 StF MSNA Plus
FreeDOS 2.0
Restore Media:
Windows 10 DRDVD
Windows 10 DRUSB
Windows 10 Pro 64 OSDVD
Windows 10 Pro 64 OSUSB
Certied:
Microsoft WHQL
Web-only support:
Windows 10 Enterprise 64
Windows 10 Pro 64 CBB 1703
Windows 10 Enterprise 64 LTSB 1607
Serviceability End user replaceable parts:
5
Category Description
AC adapter
Solid-state drive
Memory module
WLAN module
WWAN module
Keyboard
6 Chapter 1 Product description
2 Components
Your computer features top-rated components. This chapter provides details about your components, where
they're located, and how they work.
Right
Component Description
(1) SIM card slot or plug Supports a wireless subscriber identity module (SIM) card or
plug.
NOTE: All models have a SIM card slot and icon, but models
that do not have the HP Mobile Broadband Module, a wireless
wide area network (WWAN) device, installed at the factory are
shipped with a non-removable plug inserted into the slot.
(2) Audio-out (headphone)/Audio-in (microphone)
combo jack
(3) USB 3.x SuperSpeed port Connects a USB device, such as a cell phone, camera, activity
(4) HDMI port Connects an optional video or audio device, such as a high-
Connects optional powered stereo speakers, headphones,
earbuds, a headset, or a television audio cable. Also connects an
optional headset microphone. This jack does not support
optional standalone microphones.
WARNING! To reduce the risk of personal injury, adjust the
volume before putting on headphones, earbuds, or a headset.
For additional safety information, refer to the Regulatory,
Safety, and Environmental Notices.
To access this guide:
▲ Select the Start button, select HP Help and Support, and
then select HP Documentation.
‒ or –
▲ Select the Start button, select HP, and then select HP
Documentation.
NOTE: When a device is connected to the jack, the computer
speakers are disabled.
tracker, or smartwatch, and provides high-speed data transfer.
denition television, any compatible digital or audio
Right 7
Component Description
component, or a high-speed High Denition Multimedia
Interface (HDMI) device.
(5) RJ-45 (network) jack/status lights Connects a network cable.
●
Green (left): The network is connected.
●
Amber (right): Activity is occurring on the network.
(6) Docking connector Connects an optional docking device.
(7) USB Type-C power connector and
Thunderbolt™ port with HP Sleep and Charge
(8) Power connector Connects an AC adapter.
(9) Battery light When AC power is connected:
Connects an AC adapter that has a USB Type-C connector,
supplying power to the computer and, if needed, charging the
computer battery.
– and –
Connects and charges most USB devices that have a Type-C
connector, such as a cell phone, camera, activity tracker, or
smartwatch, and provides high-speed data transfer.
– and –
Connects a display device that has a USB Type-C connector,
providing DisplayPort output.
NOTE: Your computer may also support a Thunderbolt
docking station.
NOTE: Cables and/or adapters (purchased separately) may be
required.
●
White: The battery charge is greater than 90 percent.
●
Amber: The battery charge is from 0 to 90 percent.
●
O: The battery is not charging.
When AC power is disconnected (battery not charging):
●
Blinking amber: The battery has reached a low battery
level. When the battery has reached a critical battery level,
the battery light begins blinking rapidly.
●
O: The battery is not charging.
8 Chapter 2 Components
Left
Component Description
(1) Security cable slot Attaches an optional security cable to the computer.
NOTE: The security cable is designed to act as a deterrent, but
it may not prevent the computer from being mishandled or
stolen.
(2) Vent Enables airow to cool internal components.
NOTE: The computer fan starts up automatically to cool
internal components and prevent overheating. It is normal for
the internal fan to cycle on and o during routine operation.
(3) USB 3.x SuperSpeed port with HP Sleep and
Charge
(4) Smart card reader Supports optional smart cards.
Connects a USB device, provides high-speed data transfer, and
even when the computer is o, charges most products such as a
cell phone, camera, activity tracker, or smartwatch.
Left 9
Display
NOTE: Refer to the illustration that most closely matches your computer.
10 Chapter 2 Components
Component Description
(1) WWAN antennas* (select products only) Send and receive wireless signals to communicate with wireless wide
area networks (WWANs).
(2) Camera light(s) (select products only) On: One or more cameras are in use.
(3) Internal microphones Record sound.
(4) Camera(s) (select products only) Allow(s) you to video chat, record video, and record still images.
NOTE: Camera functions vary depending on the camera hardware
and software installed on your product.
(5) WLAN antennas* (select products only) Send and receive wireless signals to communicate with wireless local
area networks (WLANs).
*The antennas are not visible from the outside of the computer. For optimal transmission, keep the areas immediately around the
antennas free from obstructions.
For wireless regulatory notices, see the section of the Regulatory, Safety, and Environmental Notices that applies to your country or
region.
To access this guide:
▲ Select the Start button, select HP Help and Support, and then select HP Documentation.
‒ or –
▲ Select the Start button, select HP, and then select HP Documentation.
Display 11
Keyboard area
TouchPad
Component Description
(1) Pointing stick Moves the pointer on the screen.
(2) Left pointing stick button Functions like the left button on an external mouse.
(3) TouchPad zone Reads your nger gestures to move the pointer or activate
(4) Right pointing stick button Functions like the right button on an external mouse.
(5) Near Field Communications (NFC) tapping area
and antenna* (select products only)
*The antenna is not visible from the outside of the computer. For optimal transmission, keep the area immediately around the antenna
free from obstructions.
For wireless regulatory notices, see the section of the Regulatory, Safety, and Environmental Notices that applies to your country or
region.
To access this guide:
▲ Select the Start button, select HP Help and Support, and then select HP Documentation.
‒ or –
▲ Select the Start button, select HP, and then select HP Documentation.
items on the screen.
Allows you to wirelessly share information when you tap it with
an NFC-enabled device.
12 Chapter 2 Components
Lights
Component Description
(1) Power light
(2) Caps lock light On: Caps lock is on, which switches the key input to all capital
(3) Mute light
(4) Microphone mute light
(5) Num lk light On: Num lock is on.
(6) Wireless light On: An integrated wireless device, such as a wireless local area
●
On: The computer is on.
●
Blinking: The computer is in the Sleep state, a power-saving
state. The computer shuts o power to the display and
other unneeded components.
●
O: The computer is o or in Hibernation. Hibernation is a
power-saving state that uses the least amount of power.
letters.
●
On: Computer sound is o.
●
O: Computer sound is on.
●
On: Microphone is o.
●
O: Microphone is on.
network (WLAN) device and/or a Bluetooth® device, is on.
NOTE: On some models, the wireless light is amber when all
wireless devices are o.
Keyboard area 13
Component Description
(7) Sharing or presenting light On: Sharing is on.
(8) Call answer light On: Call answer is on.
(9) Call end light On: Call end is on.
(10) Fn lock light On: The fn key is locked. For more information, see Hot keys
(select products only) on page 18.
14 Chapter 2 Components
Buttons, speakers, and ngerprint reader
Component Description
(1) Power button
(2) Vents (2) Enable airow to cool internal components.
(3) Speakers (2) Produce sound.
(4) Fingerprint reader or
plug
●
When the computer is o, press the button to turn on the computer.
●
When the computer is on, press the button briey to initiate Sleep.
●
When the computer is in the Sleep state, press the button briey to exit Sleep.
●
When the computer is in Hibernation, press the button briey to exit Hibernation.
CAUTION: Pressing and holding down the power button results in the loss of unsaved
information.
If the computer has stopped responding and shutdown procedures are ineective, press and
hold the power button for at least 5 seconds to turn o the computer.
To learn more about your power settings, see your power options.
▲
Right-click the Power meter icon and then select Power Options.
NOTE: The computer fan starts up automatically to cool internal components and prevent
overheating. It is normal for the internal fan to cycle on and o during routine operation.
Allows a ngerprint logon to Windows, instead of a password logon.
NOTE: The ngerprint reader and plug look similar. To verify you have a ngerprint reader
and not a plug, press the Windows key on your keyboard, select Settings, select
Accounts, and then select Sign-in options and follow the on-screen instructions.
Keyboard area 15
Special keys
Component Description
(1) esc key Displays system information when pressed in combination with the fn key.
(2) fn key Executes frequently used system functions when pressed in combination with
another key. Such key combinations are called hot keys.
See Hot keys (select products only) on page 18.
(3) Windows key Opens the Start menu.
NOTE: Pressing the Windows key again will close the Start menu.
(4) Action keys Execute frequently used system functions.
See Action keys on page 17.
(5) Integrated numeric keypad A separate keypad to the right of the alphabet keyboard. When num lk is pressed,
the integrated keypad can be used like an external numeric keypad.
NOTE: If the keypad function is active when the computer is turned o, that
function is reinstated when the computer is turned back on.
(6) Windows application key
(select products only)
(7) num lk key Turns the embedded numeric keypad on and o.
Displays options for a selected object.
– or –
Alternates between the navigational and numeric functions on the integrated
numeric keypad.
16 Chapter 2 Components
Action keys
An action key performs the function indicated by the icon on the key. To determine which keys are on your
product, see Special keys on page 16.
▲
Icon Description
To use an action key, press and hold the key.
Switches the screen image among display devices connected to the system. For example, if a monitor is
connected to the computer, repeatedly pressing the key alternates the screen image from computer display
to monitor display to simultaneous display on both the computer and monitor.
Helps prevent side-angle viewing from onlookers. If needed, decrease or increase brightness for well-lit or
darker environments. Press the key again to turn o the privacy screen.
NOTE: To quickly turn on the highest privacy setting, press fn+p.
Decreases the screen brightness incrementally as long as you hold down the key.
Increases the screen brightness incrementally as long as you hold down the key.
Mutes or restores speaker sound.
Decreases speaker volume incrementally while you hold down the key.
Increases speaker volume incrementally while you hold down the key.
Mutes the microphone.
Turns the keyboard backlight o or on.
NOTE: To conserve battery power, turn o this feature.
Turns the wireless feature on or o.
NOTE: A wireless network must be set up before a wireless connection is possible.
Provides quick access to your Skype for Business calendar.
NOTE: This feature requires Skype® for Business or Lync® 2013 running on Microsoft Exchange or Oce
365® servers.
Turns the screen sharing function on or o.
NOTE: This feature requires Skype for Business or Lync 2013 running on Microsoft Exchange or Oce 365
servers.
Keyboard area 17
Icon Description
●
Answers a call.
●
Starts a call during a 1-on-1 chat.
●
Places a call on hold.
NOTE: This feature requires Skype for Business or Lync 2013 running on Microsoft Exchange or Oce 365
servers.
●
Ends a call.
●
Declines incoming calls.
●
Ends screen sharing.
NOTE: This feature requires Skype for Business or Lync 2013 running on Microsoft Exchange or Oce 365
servers.
NOTE: The action key feature is enabled at the factory. You can disable this feature by pressing and holding
the fn key and the left shift key. The fn lock light will turn on. After you have disabled the action key feature,
you can still perform each function by pressing the fn key in combination with the appropriate action key.
Hot keys (select products only)
A hot key is the combination of the fn key and another key.
To use a hot key:
▲
Press the fn key, and then press one of the keys listed in the following table.
Key Description
C Turns on scroll lock.
R Breaks the operation.
S Sends a programing query.
18 Chapter 2 Components
Bottom
Component Description
Vent Enables airow to cool internal components.
NOTE: The computer fan starts up automatically to cool internal
components and prevent overheating. It is normal for the internal fan
to cycle on and o during routine operation.
Bottom 19
Front
Component Description
(1) Power light
(2) Wireless light On: An integrated wireless device, such as a wireless local
(3) Drive light
●
On: The computer is on.
●
Blinking: The computer is in the Sleep state, a powersaving state. The computer shuts o power to the
display and other unneeded components.
●
O: The computer is o or in Hibernation.
Hibernation is a power-saving state that uses the
least amount of power.
area network (WLAN) device and/or a Bluetooth® device, is
on.
NOTE: On some models, the wireless light is amber when
all wireless devices are o.
●
Blinking white: The hard drive is being accessed.
●
Amber: HP 3D DriveGuard has temporarily parked the
hard drive.
20 Chapter 2 Components
Cover
Component Description
Internal microphone(s) (1 or 2 depending on model) Record(s) sound.
Cover 21
Labels
The labels axed to the computer provide information you may need when you troubleshoot system
problems or travel internationally with the computer. Labels may be in paper form or imprinted on the
product.
IMPORTANT: Check the following locations for the labels described in this section: the bottom of the
computer, inside the battery bay, under the service door, on the back of the display, or on the bottom of a
tablet kickstand.
●
Service label—Provides important information to identify your computer. When contacting support, you
may be asked for the serial number, the product number, or the model number. Locate this information
before you contact support.
Your service label will resemble one of the examples shown below. Refer to the illustration that most
closely matches the service label on your computer.
Component
(1) HP product name (select products only)
(2) Model number
(3) Product ID
(4) Serial number
(5) Warranty period
Component
(1) HP product name (select products only)
(2) Product ID
22 Chapter 2 Components
Component
(3) Serial number
(4) Warranty period
●
Regulatory label(s)—Provide(s) regulatory information about the computer.
●
Wireless certication label(s)—Provide(s) information about optional wireless devices and the approval
markings for the countries or regions in which the devices have been approved for use.
Labels 23
3 Illustrated parts catalog
Computer major components
NOTE: HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
NOTE: Details about your computer, including model, serial number, product key, and length of warranty,
are on the service tag at the bottom of your computer. See Labels on page 22 for details.
24 Chapter 3 Illustrated parts catalog
Item Component Spare part number
(1) Display assemblies are spared at the subcomponent level only. For display assembly
spare part information, see Display assembly subcomponents on page 28.
(2) Touch not spared as whole hinge-up
(3) Keyboard (see Keyboard on page 45)
For a list of keyboard country codes, see Keyboard on page 45.
Without a backlight L15542-xx1
With a backlight L15540-xx1
With a backlight, privacy L15541-xx1
(4) Top cover L17825-001
(5) RJ-45 board with bracket L19422-001
(6) TouchPad
For use in models without an NFC module L15544-001
For use in models with an NFC module L19419-001
(7) TouchPad button board L17826-001
(8) RTC battery L17255-001
(9) Power button board L14374-001
(10) USB board L14380-001
not spared as whole hinge-up
(11) USB board bracket L14380-001
(12) Fingerprint reader assembly (includes cable) L15537-001
(13) NFC module (includes antenna and TouchPad foam) L14385-001
(14) Speakers (includes cable) L13684-001
(15) Smart card reader board (includes cable) L18312-001
(16) System board (includes processor and replacement thermal material, see System board on page 67)
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating systems
xxxxxx-601: Windows operating system
For use in models with discrete graphics memory
Intel i7-8650U processor L16126-xx1
Intel i7-8550U processor L16124-xx1
Intel i5-8350U processor L16121-xx1
Intel i5-8250U processor L16119-xx1
Intel i5-7200U processor L16117-xx1
For use in models with UMA graphics memory
Intel i7-8650U processor L15522-001
Intel i7-8550U processor L15520-001
Computer major components 25
Item Component Spare part number
Intel i5-8350U processor L15518-001
Intel i5-8250U processor L15516-001
Intel i5-7300U processor L15523-001
Intel i5-7200U processor L15514-001
(17) Fan L22306-001
Heat sink
(18) For use in models with discrete graphics memory L14373-001
(19) For use in models with UMA graphics memory L14372-001
(20) Memory module (DDR-2400)
4-GB 820569-001
8-GB 820570-001
16-GB 820571-001
(21) WLAN/Bluetooth combo card
Realtek RTL8822BE 802.11ac 2x2 Wi-Fi + Bluetooth 4.2 Combo Adapter 915623-001
Intel Dual band wireless-AC 8265 802.11AC 2x2 WiFi + Bluetooth 4.2 Combo Adaptor
(vPro)
Intel Dual band wireless-AC 8265 802.11AC 2x2 WiFi + Bluetooth 4.2 Combo Adaptor
(non-vPro)
(22) WWAN module
LTE CAT4: Huawei HP lt4132, LTE/HSPA+ w/GPS 845710-003
LTE CAT9: Fibocom Intel XMM 7360 LTE-Advanced 917823-001
(23) Solid-state drive (SSD)
1 TB, PCIe, Gen3×4, NVMe, TLC L17246-001
1 TB, PCIe, Gen3×4, NVMe, SS, MLC L17848-001
512 GB, PCIe, Gen3×4, SS, TLC L17852-001
512 GB, PCIe, Gen3×4, SS, MLC L17851-001
512 GB, PCIe, Gen3×4, Self-encrypting drive (SED), Opal 2, TLC L17250-001
512 GB, SATA-3, FIPS-140–2, TLC L17249-001
256 GB, PCIe, Gen3x4, SS, NVMe, TLC L17247-001
256 GB, PCIe, Gen3x4, TLC, Opal 2, Self-encrypting drive (SED) L17850-001
256 GB, PCIe, Gen3x4, SS, NVMe, MLC L17849-001
851592-001
851594-001
128 GB, SATA-3, TLC L17847-001
(24) Battery (3 cell, 50 WHr, 4.33 Ah) 933321-855
(25) Bottom cover L15536-001
26 Chapter 3 Illustrated parts catalog
Cable Kit
Item Description Spare part number
Cable Kit L14370-001
(1) Keyboard cable
(2) USB board cable
(3) Card reader cable
(4) TouchPad cable
(5) Fingerprint reader cable
(6) NFC cable
Cable Kit 27
Display assembly subcomponents
Item Component Spare part number
(1) Bezel
For use in models with microphone modules L15505-001
For use in models with an HD camera (includes camera shutter) L15506-001
For use in models with an IR camera (includes camera shutter) L15507-001
For use in models with an IR camera and an ambient light sensor (includes camera shutter) L15508-001
(2) Raw panel
FHD, 220 nits, non-touch (includes cable) L17853-001
FHD, 400 nits, non-touch (includes cable) L17854-001
28 Chapter 3 Illustrated parts catalog
Item Component Spare part number
UHD, 400 nits, non-touch (includes cable) L17855-001
FHD, touch, privacy screen L17856-001
FHD, touch L17857-001
(3) Hinge cover
For use in models with touch displays L15538-001 (Hinge Kit)
For use in models with non-touch displays L15539-001 (Hinge Kit)
(4) Ambient light sensor board (includes double-sided tape) L15511-001
(5) Camera module
HD camera L15510-001
IR camera L15509-001
Microphone module (includes double-sided tape; not shown) L15512-001
(6) Camera cable (HD and IR models) L14370-001 (Cable Kit)
(7) Hinges (left and right) (for use in models with touch displays) L15538-001 (Hinge Kit)
Hinges (left and right) (for use in models with non-touch displays) L15539-001 (Hinge Kit)
(8) WLAN antenna (spared with display enclosure)
(9) WWAN antenna (spared with display enclosure)
(10) Display cable L14370-001 (Cable Kit)
(11) Display enclosure (includes tape, gasket, and foam for display)
For use in models without a WWAN module L17823-001
For use in models with a WWAN module L17824-001
Display assembly subcomponents 29
Plastics Kit
Item Component Spare part number
Plastics kit L17827-001
(1) SIM card reader insert
(2) Fingerprint reader insert
(3) Smart card reader insert
Miscellaneous parts
Component Spare part number
AC adapter _non-PFC, 4.5 mm
65 W HP Smart AC adapter, 3 prong 710412-001
65 W HP Smart AC Travel Adapter 693716-001
65 W HP Smart AC adapter, EM 913691-850
65 W, wall mount, 3 pin, USB-C 860209-850
45 W HP Smart AC adapter, 2 prong 742436-001
45 W HP Smart AC Adapter, non-slim 741727-001
45 W, wall mount, 3 pin, USB-C 860210-850
Screw Kit L14352-001
30 Chapter 3 Illustrated parts catalog
4 Removal and replacement procedures
preliminary requirements
Tools required
You will need the following tools to complete the removal and replacement procedures:
●
Phillips P0 screwdriver
Service considerations
The following sections include some of the considerations that you must keep in mind during disassembly
and assembly procedures.
NOTE: As you remove each subassembly from the computer, place the subassembly (and all accompanying
screws) away from the work area to prevent damage.
Plastic parts
CAUTION: Using excessive force during disassembly and reassembly can damage plastic parts. Use care
when handling the plastic
Tools required 31
Cables and connectors
CAUTION: When servicing the computer, be sure that cables are placed in their proper locations during the
reassembly process. Improper cable placement can damage the computer.
Cables must be handled with extreme care to avoid damage. Apply only the tension required to unseat or seat
the cables during removal and insertion. Handle cables by the connector whenever possible. In all cases, avoid
bending, twisting, or tearing cables. Be sure that cables are routed in such a way that they cannot be caught
or snagged by parts being removed or replaced. Handle ex cables with extreme care; these cables tear
easily.
Drive handling
CAUTION: Drives are fragile components that must be handled with care. To prevent damage to the
computer, damage to a drive, or loss of information, observe these precautions:
Before removing or inserting a hard drive, shut down the computer. If you are unsure whether the computer is
o or in Hibernation, turn the computer on, and then shut it down through the operating system.
Before handling a drive, be sure that you are discharged of static electricity. While handling a drive, avoid
touching the connector.
Before removing a diskette drive or optical drive, be sure that a diskette or disc is not in the drive and be sure
that the optical drive tray is closed.
Handle drives on surfaces covered with at least one inch of shock-proof foam.
Avoid dropping drives from any height onto any surface.
Avoid exposing an internal hard drive to products that have magnetic elds, such as monitors or speakers.
Avoid exposing an internal hard drive to products that have magnetic elds, such as monitors or speakers.
Avoid exposing a drive to temperature extremes or liquids.
If a drive must be mailed, place the drive in a bubble pack mailer or other suitable form of protective
packaging and label the package “FRAGILE.”
32 Chapter 4 Removal and replacement procedures preliminary requirements
Grounding guidelines
Electrostatic discharge damage
Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine
the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many
cases, ESD contains enough power to alter device parameters or melt silicon junctions.
A discharge of static electricity from a nger or other conductor can destroy static-sensitive devices or
microcircuitry. Even if the spark is neither felt nor heard, damage may have occurred.
An electronic device exposed to ESD may not be aected at all and can work perfectly throughout a normal
cycle. Or the device may function normally for a while, then degrade in the internal layers, reducing its life
expectancy.
CAUTION: To prevent damage to the computer when you are removing or installing internal components,
observe these precautions:
Keep components in their electrostatic-safe containers until you are ready to install them.
Before touching an electronic component, discharge static electricity by using the guidelines described in this
section.
Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.
If you remove a component, place it in an electrostatic-safe container.
The following table shows how humidity aects the electrostatic voltage levels generated by dierent
activities.
CAUTION: A product can be degraded by as little as 700 V.
Typical electrostatic voltage levels
Relative humidity
Event 10% 40% 55%
Walking across carpet 35,000 V 15,000 V 7,500 V
Walking across vinyl oor 12,000 V 5,000 V 3,000 V
Motions of bench worker 6,000 V 800 V 400 V
Removing DIPS from plastic tube 2,000 V 700 V 400 V
Removing DIPS from vinyl tray 11,500 V 4,000 V 2,000 V
Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V
Removing bubble pack from PCB 26,500 V 20,000 V 7,000 V
Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V
Grounding guidelines 33
Packaging and transporting guidelines
Follow these grounding guidelines when packaging and transporting equipment:
●
To avoid hand contact, transport products in static-safe tubes, bags, or boxes.
●
Protect ESD-sensitive parts and assemblies with conductive or approved containers or packaging.
●
Keep ESD-sensitive parts in their containers until the parts arrive at static-free workstations.
●
Place items on a grounded surface before removing items from their containers.
●
Always be properly grounded when touching a component or assembly.
●
Store reusable ESD-sensitive parts from assemblies in protective packaging or nonconductive foam.
●
Use transporters and conveyors made of antistatic belts and roller bushings. Be sure that mechanized
equipment used for moving materials is wired to ground and that proper materials are selected to avoid
static charging. When grounding is not possible, use an ionizer to dissipate electric charges.
Workstation guidelines
Follow these grounding workstation guidelines:
●
Cover the workstation with approved static-shielding material.
●
Use a wrist strap connected to a properly grounded work surface and use properly grounded tools and
equipment.
●
Use conductive eld service tools, such as cutters, screwdrivers, and vacuums.
●
When xtures must directly contact dissipative surfaces, use xtures made only of static safe materials.
●
Keep the work area free of nonconductive materials, such as ordinary plastic assembly aids and
Styrofoam.
●
Handle ESD-sensitive components, parts, and assemblies by the case or PCM laminate. Handle these
items only at static-free workstations.
●
Avoid contact with pins, leads, or circuitry.
●
Turn o power and input signals before inserting or removing connectors or test equipment.
34 Chapter 4 Removal and replacement procedures preliminary requirements
Equipment guidelines
Grounding equipment must include either a wrist strap or a foot strap at a grounded workstation.
●
When seated, wear a wrist strap connected to a grounded system. Wrist straps are exible straps with a
minimum of one megohm ±10% resistance in the ground cords. To provide proper ground, wear a strap
snugly against the skin at all times. On grounded mats with banana-plug connectors, use alligator clips
to connect a wrist strap.
●
When standing, use foot straps and a grounded oor mat. Foot straps (heel, toe, or boot straps) can be
used at standing workstations and are compatible with most types of shoes or boots. On conductive
oors or dissipative oor mats, use foot straps on both feet with a minimum of one megohm resistance
between the operator and ground. To be eective, the conductive must be worn in contact with the skin.
The following grounding equipment is recommended to prevent electrostatic damage:
●
Antistatic tape
●
Antistatic smocks, aprons, and sleeve protectors
●
Conductive bins and other assembly or soldering aids
●
Nonconductive foam
●
Conductive tabletop workstations with ground cords of one megohm resistance
●
Static-dissipative tables or oor mats with hard ties to the ground
●
Field service kits
●
Static awareness labels
●
Material-handling packages
●
Nonconductive plastic bags, tubes, or boxes
●
Metal tote boxes
●
Electrostatic voltage levels and protective materials
The following table lists the shielding protection provided by antistatic bags and oor mats.
Material Use Voltage protection level
Antistatic plastics Bags 1,500 V
Carbon-loaded plastic Floor mats 7,500 V
Metallized laminate Floor mats 5,000 V
Grounding guidelines 35
5 Removal and replacement procedures for
Customer Self-Repair parts
This chapter provides removal and replacement procedures for Customer Self-Repair parts.
NOTE: The Customer Self-Repair program is not available in all locations. Installing a part not supported by
the Customer Self-Repair program may void your warranty. Check your warranty to determine if Customer
Self-Repair is supported in your location.
Component replacement procedures
NOTE: Details about your computer, including model, serial number, product key, and length of warranty,
are on the service tag at the bottom of your computer. See Labels on page 22 for details.
NOTE: HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
There are as many as 12 screws that must be removed, replaced, and/or loosened when servicing Customer
Self-Repair parts. Make special note of each screw size and location during removal and replacement.
Bottom cover
Description Spare part number
Bottom cover L15536-001
Before removing the bottom cover, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
Remove the bottom cover:
1. Turn the computer upside down on a at surface.
36 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
2. Loosen the ve captive screws (1) and the two inset captive screws (2) that secure the bottom cover.
3. Starting under the display in the upper left corner, pry (1) and lift the bottom cover o the computer (2).
Reverse the removal procedures to install the bottom cover.
Component replacement procedures 37
Solid-state drive (SSD)
Description Spare part number
1 TB, PCIe, Gen3×4, NVMe, TLC L17246-001
1 TB, PCIe, Gen3×4, NVMe, SS, MLC L17848-001
512 GB, PCIe, Gen3×4, SS, TLC L17852-001
512 GB, PCIe, Gen3×4, SS, MLC L17851-001
512 GB, PCIe, Gen3×4, Self-encrypting drive (SED), Opal 2, TLC L17250-001
512 GB, SATA-3, FIPS-140–2, TLC L17249-001
256 GB, PCIe, Gen3x4, SS, NVMe, TLC L17247-001
256 GB, PCIe, Gen3x4, TLC, Opal 2, Self-encrypting drive (SED) L17850-001
256 GB, PCIe, Gen3x4, SS, NVMe, MLC L17849-001
128 GB, SATA-3, TLC L17847-001
Before removing the solid-state drive, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the solid-state drive:
1. Remove the Phillips M2.0×2.0 screw (1) that secures the drive to the system board.
2. Remove the drive by pulling it away from the connector (2).
NOTE: M.2 solid-state drives are designed with notches to prevent incorrect insertion.
Reverse this procedure to install the solid-state drive.
38 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
Memory modules
NOTE: Primary and expansion memory is installed in a side-by-side conguration in the bottom of the
computer.
If only one memory module is installed, it must be installed in the socket labeled ‘1’.
Description Spare part number
4-GB (DDR-2400) 820569-001
8-GB (DDR-2400) 820570-001
16-GB (DDR-2400) 820571-001
Update BIOS before adding memory modules
Before adding new memory, make sure you update the computer to the latest BIOS.
CAUTION: Failure to update the computer to the latest BIOS prior to installing new memory may result in
various system problems.
To update BIOS:
1. Navigate to www.hp.com.
2. Click Support & Drivers > click Drivers & Software.
3. In the Enter a product name/number box, type the computer model information, and then click Search.
4. Click the link for the computer model.
5. Select the operating system, and then click Next.
6. Under Step 2: Select a Download, click the BIOS link.
7. Click the link for the most recent BIOS.
8. Click the Download button, and then follow the on-screen instructions.
Before removing the memory module, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the memory module:
1. Spread the retaining tabs (1) on each side of the memory module slot to release the memory module.
(The edge of the module opposite the slot rises away from the computer.)
Component replacement procedures 39
2. Remove the memory module (2) by pulling the module away from the slot at an angle.
NOTE: Memory modules are designed with a notch to prevent incorrect insertion into the memory
module slot.
NOTE: The computer uses two memory sockets. The socket labeled ‘2’ houses the expansion memory
module and the socket labeled ‘1’ houses the primary memory module. The removal procedure is the
same for both memory sockets.
Reverse this procedure to install a memory module.
40 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
WLAN/Bluetooth combo card
The computer uses a card that provides both WLAN and Bluetooth functionality.
The WLAN module and WWAN module are not interchangeable.
Description Spare part number
Realtek RTL8822BE 802.11ac 2x2 Wi-Fi + Bluetooth 4.2 Combo Adapter 915623-001
Intel Dual Band Wireless-AC 3165 802.11ac 1x1 WiFi + BT 4.0 combo adapter 851592-001
Intel Dual Band Wireless-AC 8260NGW 802.11a/g/g/n+ac 2x2 WiFi + BT 4.2 combo adapter 851594-001
Before removing the WLAN module, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The WLAN antenna cable labeled ‘1’ connects to the WLAN module “Main” terminal labeled ‘1’.
The WLAN antenna cable labeled ‘2’ connects to the WLAN module ‘Aux’ terminal labeled ‘2’. If the
computer is equipped with an 802.11a/b/g/n WLAN module, the yellow WLAN antenna cable connects to
the middle terminal on the WLAN module.
2. Remove the Phillips M2.0×2.0 screw (2) that secures the WLAN module to the computer. (The edge of
the module opposite the slot rises away from the computer.)
Component replacement procedures 41
3. Remove the WLAN module by pulling the module away from the slot at an angle (3).
NOTE: WLAN modules are designed with a notch to prevent incorrect insertion.
NOTE: If the WLAN antennas are not connected to the terminals on the WLAN module, the protective
sleeves must be installed on the antenna connectors, as shown in the following illustration.
Reverse this procedure to install the WLAN module.
42 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
WWAN module
The WLAN module and WWAN module are not interchangeable.
The WWAN module is available on select models only.
Description Spare part number
LTE CAT4: Huawei HP lt4132, LTE/HSPA+ w/GPS 845710-003
LTE CAT9: Fibocom Intel XMM 7360 LTE-Advanced 917823-001
Before removing the WWAN module, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the WWAN module:
1. Position the computer upside-down.
2. Disconnect the WWAN antenna cables (1) from the terminals on the WWAN module.
NOTE: The red WWAN antenna cable is connected to the WWAN module ‘Main’ terminal. The blue
WWAN antenna cable is connected to the WWAN module ‘Aux’ terminal.
3. Remove the Phillips M2.0×2.0 screw (2) that secures the WWAN module to the computer. (The edge of
the module opposite the slot rises away from the computer.)
Component replacement procedures 43
4. Remove the WWAN module (3) by pulling the module away from the slot at an angle.
NOTE: WWAN modules are designed with a notch to prevent incorrect insertion.
NOTE: If the WWAN antennas are not connected to the terminals on the WWAN module, the protective
sleeves must be installed on the antenna connectors, as shown in the following illustration.
Reverse this procedure to install the WWAN module.
44 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
Keyboard
In this section, the rst table provides the main spare part number for the keyboards. The second table
provides the country codes.
Description Spare part number
Keyboard, no backlight L15542-xx1
Keyboard, backlit L15540-xx1
Keyboard, backlit, privacy L15541-xx1
For use in country
or region
Belgium -A41 India -D61 Slovenia -BA1
Brazil -201 Israel -BB1 South Korea -AD1
Bulgaria -261 Italy -061 Spain -071
Canada -DB1 Japan -291 Sweden and Finland -B71
Czech Republic
and Slovakia
Denmark -081 The Netherlands -B31 Taiwan -AB1
Denmark, Finland, and
Norway
France -051 Norway -091 Turkey -141
Germany -041 Portugal -131 Turkey F -541
Greece -151 Romania -271 United Kingdom -031
Hungary -211 Russia -251 United States -001
Iceland -DD1 Saudi Arabia -171
Spare part
number
-FL1 Latin America -161 Switzerland -BG1
-DH1 Northern Africa -FP1 Thailand -281
For use in country
or region
Spare part
number
For use in country
or region
Spare part
number
Before removing the keyboard, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the keyboard:
1. Remove the two Phillips M2.0×3.0 screws that secure the keyboard to the computer (1).
NOTE: The screws are labeled with a keyboard symbol.
Component replacement procedures 45
2. Insert a screwdriver or similar thin tool into the release hole near the fan, and then press on the back of
the keyboard until it disengages from the computer (2).
NOTE: Cables connect the bottom of the keyboard to the system board. Make sure not to prematurely
pull the keyboard cables out of the system board connectors.
3. Position the computer upright with the front toward you, and then open the computer as far as possible.
4. Lift to disengage the top of the keyboard (1), and then rotate the keyboard over onto the palm rest (2).
5. With the keyboard resting on the palm rest (1), disconnect the main keyboard cable from the system
board ZIF connector (2).
6. Disconnect the pointing stick cable from the system board ZIF connector (3).
7. Disconnect the keyboard backlight cable from the system board ZIF connector (4) (select models only).
46 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
8. Remove the keyboard (5).
Reverse this procedure to install the keyboard.
Component replacement procedures 47
6 Removal and replacement procedures for
Authorized Service Provider parts
This chapter provides removal and replacement procedures for Authorized Service Provider only parts.
CAUTION: Components described in this chapter should only be accessed by an authorized service provider.
Accessing these parts can damage the computer or void the warranty.
CAUTION: This computer does not have user-replaceable parts. Only HP authorized service providers should
perform the removal and replacement procedures described here. Accessing the internal part could damage
the computer or void the warranty.
Component replacement procedures
NOTE: Details about your computer, including model, serial number, product key, and length of warranty,
are on the service tag at the bottom of your computer. See Labels on page 22 for details.
NOTE: HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
There are as many as 81 screws that must be removed, replaced, and/or loosened when servicing Authorized
Service Provider only parts. Make special note of each screw size and location during removal and
replacement.
48 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Battery
Description Spare part number
Battery, 3 cell, 50 WHr, 4.33 Ah 933321-855
Before removing the battery, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
To remove the battery:
CAUTION: Removing a battery that is the sole power source for the computer can cause loss of information.
To prevent loss of information, save your work and shut down the computer through Windows before
removing the battery.
1. Disconnect the battery cable from the system board (1).
2. Remove the ve Torx T8 2.0×4.0 screws (2).
Component replacement procedures 49
3. Rotate the top of the battery upward (1), and then lift the battery out of the computer (2).
IMPORTANT: When installing the battery, insert the tabs on the bottom of battery into the clips built
into the computer (3), and then rotate the battery into place
Reverse the removal procedures to install the battery.
50 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Heat sink assembly
NOTE: The heat sink assembly spare part kit includes replacement thermal material.
Description Spare part number
Heat sink for use in models with discrete graphics memory L14373-001
Heat sink for use in models with UMA graphics memory L14372-001
Before removing the heat sink assembly, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the heat sink assembly:
1. Discrete graphics models: Loosen the six captive screws on the heat sink following the sequence
stamped on the heat sink (1), and then remove the heat sink from the system board (2).
CAUTION: Take extreme care when removing the heat sink. The heatpipe is very fragile and can be
easily damaged and bent during removal.
Component replacement procedures 51
2. Thoroughly clean the thermal material from the surfaces of the system board components (1)(3) and
the heat sink (2)(4) each time the heat sink is removed. Replacement thermal material is included with
the heat sink and system board spare part kits.
3. UMA graphics models: Loosen the four captive screws on the heat sink following the sequence stamped
on the heat sink (1), and then remove the heat sink from the system board (2).
CAUTION: Take extreme care when removing the heat sink and fan assembly. The heatpipe is very
fragile and can be easily damaged and bent during removal.
52 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
4. Thoroughly clean the thermal material from the surfaces of the system board component (1) and the
heat sink (2) each time the heat sink is removed. Replacement thermal material is included with the heat
sink and system board spare part kits.
Reverse this procedure to install the heat sink.
Component replacement procedures 53
RTC battery
Description Spare part number
RTC battery L17255-001
Before removing the RTC battery, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the RTC battery:
1. Disconnect the RTC battery cable from the system board (1).
2. Using a at tool, pry the battery from the holder (2), and then remove the battery from the computer
computer on, and then shut it down through the operating system.
then unplugging the AC adapter from the computer.
(3).
Reverse this procedure to install the RTC battery.
54 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
USB board
Description Spare part number
USB board (includes bracket) L14380-001
Before removing the USB board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the USB board:
1. Disconnect the cable from the USB board (1).
2. Remove the two Phillips M2.0×3.0 screws (2) that secure the board to the computer.
3. Lift the bracket from atop the board (3).
computer on, and then shut it down through the operating system.
then unplugging the AC adapter from the computer.
4. Remove the board from the computer (4).
Reverse this procedure to install the USB board.
Component replacement procedures 55
RJ-45 board with bracket
Description Spare part number
RJ-45 board with bracket L19422-001
Before removing the RJ-45 board and bracket, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the RJ-45 board and bracket:
1. Remove the six Phillips M2.5×5.0 screws (1) that secure the assembly to the computer.
2. Rotate the assembly out of the computer (2).
Reverse this procedure to install the RJ-45 assembly.
56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Power button board
Description Spare part number
Power button board assembly L14374-001
Before removing the power button board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the power button board:
NOTE: The power button board sits under the right display hinge. You do not have to remove the display to
remove the board, but you do have to rotate the right display hinge upward to gain access.
1. Remove the two Phillips M2.5×5.0 screws (1) that secure the right display hinge, and then rotate the
hinge upward from atop the power button board (2).
2. Disconnect the cable from the power button board (3).
3. Remove the Phillips M2.0×3.0 screw (4) that secures the power button board to the computer.
4. Remove the power button board from the computer (5).
Reverse this procedure to install the power button board.
Component replacement procedures 57
Speaker assembly
Description Spare part number
Speaker assembly (includes cable) L13684-001
Before removing the speaker assembly, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the speaker assembly:
1. Disconnect the speaker cable from the system board (1), and then remove the cable from the clip (2).
2. Remove the two Phillips M2.0×2.5 screws (3) that secure the speaker to the computer.
3. Remove the speaker from the computer (4).
Reverse this procedure to install the speaker.
58 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Fingerprint reader assembly
Description Spare part number
Fingerprint reader assembly (includes cable) L15537-001
Before removing the ngerprint reader assembly, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 49).
Remove the ngerprint reader assembly:
1. Remove the Phillips M2.0×3.0 screw (1) that secures the ngerprint reader bracket to the computer.
2. Lift the bracket from atop the ngerprint reader assembly (2).
3. Use a tool to pry the ngerprint reader board free from the computer (3), and then remove the assembly
from the computer (4).
Reverse this procedure to install the ngerprint reader assembly.
Component replacement procedures 59
TouchPad
Description Spare part number
TouchPad for use in models without an NFC module L15544-001
TouchPad for use in models with an NFC module L19419-001
Before removing the TouchPad, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 49).
Remove the TouchPad:
1. Disconnect the NFC module cable from the ZIF connector on the NFC module (1).
2. Disconnect the TouchPad button board cable from the ZIF connector on the TouchPad (2).
computer on, and then shut it down through the operating system.
then unplugging the AC adapter from the computer.
3. Disconnect the card reader cable from the ZIF connector on the TouchPad (3).
4. Remove the ve Phillips M2.0x2.5 screws (1) that secure the TouchPad to the computer.
60 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
5. Remove the TouchPad from the computer (2).
Reverse this procedure to install the TouchPad.
Component replacement procedures 61
TouchPad button board
Description Spare part number
TouchPad button board L17826-001
Before removing the TouchPad button board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 49).
Remove the TouchPad button board:
1. Disconnect the TouchPad button board cable from the ZIF connector on the TouchPad (1).
2. Remove the four Phillips M2.0x3.0 screws (2) that secure the board to the computer, and then remove
the TouchPad button board from the computer (3).
Reverse this procedure to install the TouchPad button board.
62 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
NFC module
Description Spare part number
NFC module (includes antenna and TouchPad foam) L14385-001
Before removing the NFC module, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 49).
Remove the NFC module:
1. Disconnect the system board cable (1) and NFC antenna (2) from the ZIF connectors on the NFC module.
2. Use a tool to release the NFC module from the adhesive securing it to the computer (3), and then remove
computer on, and then shut it down through the operating system.
the module from the computer (4).
Reverse the removal procedures to install the NFC module.
Component replacement procedures 63
Smart card reader
Description Spare part number
Smart card reader L18312-001
Smart card reader cable (available in Cable Kit) L14370-001 (Cable Kit)
Before removing the card reader, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 49).
Remove the smart card reader:
NOTE: Before you remove the smart card reader, make sure nothing (memory card or plastic insert) in
inserted in the reader.
1. Disconnect the system board cable from the connector on the smart card reader board (1).
2. Disconnect the TouchPad cable from the ZIF connector on the smart card reader board (2).
3. Remove the three Phillips M2.0x2.5 screws (3) that secure the smart card reader to the computer.
4. Remove the smart card reader from the computer (4).
Reverse this procedure to install the smart card reader.
64 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Fan
Description Spare part number
Fan L22306-001
Before removing the fan, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 49).
6. Remove the keyboard (see Keyboard on page 45).
Remove the fan:
NOTE: To remove the fan you must remove screws from both the top (under the keyboard) and bottom of
the computer.
1. Position the computer upright and open as far as possible.
2. Remove the ve Phillips M2.0×3.0 screws that secure the fan to the computer.
3. Close the computer and position it upside down.
4. Disconnect the fan cable from the system board (1).
5. Loosen the two captive Phillips screws (2) that secure the fan to the computer.
Component replacement procedures 65
6. Remove the fan from the computer (3).
Reverse this procedure to install the fan.
66 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
System board
NOTE: All system board spare part kits include replacement thermal material.
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating systems
xxxxxx-601: Windows operating system
Description Spare part number
System board for use in models with discrete graphics memory (includes integrated processor)
Intel i7-8650U processor L16126-xx1
Intel i7-8550U processor L16124-xx1
Intel i5-8350U processor L16121-xx1
Intel i5-8250U processor L16119-xx1
Intel i5-7200U processor L16117-xx1
System board for use in models with UMA graphics memory
Intel i7-8650U processor L15522-001
Intel i7-8550U processor L15520-001
Intel i5-8350U processor L15518-001
Intel i5-8250U processor L15516-001
Intel i5-7300U processor L15523-001
Intel i5-7200U processor L15514-001
Before removing the system board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 49).
6. Remove the keyboard (see Keyboard on page 45).
7. Remove the RJ-45 board and bracket (see RJ-45 board with bracket on page 56).
8. Remove the fan (see Fan on page 65).
When replacing the system board, be sure to remove the following components (as applicable) from the
defective system board and install on the replacement system board:
●
Solid-state drive (see Solid-state drive (SSD) on page 38)
●
Memory modules (see Memory modules on page 39)
Component replacement procedures 67
●
WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 41)
●
WWAN module (see WWAN module on page 43)
●
Heat sink (see Heat sink assembly on page 51)
Remove the system board:
1. Position the computer upright and open as far as possible.
2. Remove the three Phillips M2.5×3.0 screws that secure the system board to the computer.
3. Close the computer and position it upside down.
68 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
4. Disconnect the following cables from the system board:
(1) RTC battery cable
(2) Fingerprint reader cable
(3) NFC module cable
(4) Speaker cable
(5) Display cable
(6) Camera cable
(7) Power button board cable
(8) USB cable
(9) Smart card reader cable
5. Remove the four Phillips M2.5×3.0 screws that secure the system board to the computer.
6. Lift the right side of the system board up at an angle (1).
Component replacement procedures 69
7. Pull the system board up and toward the right to disengage the connectors from the left side of the
computer, and then remove the system board (2).
Reverse this procedure to install the system board.
70 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Display assembly
NOTE: Display assemblies are spared at the subcomponent level only. Additional display assembly spare
part information is available at Display assembly subcomponents on page 28.
Before removing the display assembly, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Disconnect the battery cable from the system board (see Battery on page 49).
Remove the display assembly:
1. Disconnect the antenna cables from the WWAN module (1) and the WLAN module (2).
2. Remove the antenna cables from the clips built into the computer (3).
3. Disconnect the display cable (4) and the camera cable (5) from the system board.
4. Remove the cables from the clips built into the computer (6).
5. With the computer upside down, open the display, and then place the computer on a table with the
display positioned o the edge of the table.
6. Remove the ve Phillips M2.5×5.0 screws (1) from the display hinges.
Component replacement procedures 71
7. Lift the display assembly straight up and remove it (2).
CAUTION: When installing the display assembly, be sure that the wireless antenna cables are routed
and arranged properly.
Failure to properly route the antennas can result in degradation of the computer's wireless performance.
72 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
8. To replace the display hinge cover, rotate top of hinge cover away from display enclosure to disengage
the tabs (1), and then pull the cover o the enclosure (2).
The display hinge cover (for non-privacy displays) is available in the Hinge Kit (for touch displays) using
spare part number L15538-001. The display hinge cover (for non-touch displays) is available using spare
part number L15539-001.
When installing the hinge cover, make sure all cables are routed correctly under the hinge cover and the
hooks on the end of the cover are aligned correctly with the snaps on the bottom of the display (1).
Press the left (2), and then right (3) middle sections of the hinge cover until it snaps into place.
9. To remove the display bezel, ex the top (1) of the bezel, the inside edges of the left and right sides (2),
and then the bottom (3) of the bezel until it disengages from the display enclosure.
Component replacement procedures 73
10. Remove the display bezel (4).
The display bezel is available using the following spare part numbers:
Models with a microphone module: L15505-001
Models with an HD camera: L15506-001
Models with an IR camera: L15507-001
Models with an IR camera and an ambient light sensor: L15508-001
11. Two dierent camera modules are available. Refer to the following procedure appropriate for your
computer if it is necessary to replace the camera module:
a. HD camera or microphone module
Lift upward to disengage the module from the adhesive on the display enclosure (1), disconnect
the cable from the module (2), and then remove the module from the display (3).
74 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
The HD camera module is available using spare part number L15510-001. The microphone module
is available using spare part number L15512-001.
b. IR camera
Remove the tape from atop the module (1), lift upward to disengage the module from the adhesive
on the display enclosure (2), disconnect the cables from the left and right sides of the module (3),
and then remove the camera module from the display (4).
The IR camera module is available using spare part number L15509-001.
Component replacement procedures 75
12. If it is necessary to remove the ambient light sensor board, disconnect the cable from the board (1), lift
upward to disengage the board from the adhesive on the display enclosure (2), and then remove the
board from the display (3).
The ambient light sensor board is available using spare part number L15511-001.
13. If it is necessary to remove the display panel from the enclosure, remove the four Phillips M2.0×2.0
screws that secure the panel to the display enclosure.
14. Rotate the display panel over onto the keyboard (1).
76 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
15. On the back of the display panel, lift the tape from atop the connector (2), and then disconnect the
display cable from the rear of the panel (3).
The raw display panel is available using the following spare part numbers:
FHD panel, 220 nits, non-touch: L17853-001
FHD panel, 400 nits, non-touch: L17854-001
UHD panel, non-touch: L17855-001
UHD panel, touch, privacy screen: L17856-001
FHD panel, touch: L17857-001
Component replacement procedures 77
16. If it is necessary to replace the display hinges, remove the three Phillips M2.5x11.0 screws that secure
each hinge (1), and then remove the hinges from the display enclosure (2).
Display hinges (for touch displays) are available in the Hinge Kit using spare part number L15538-001.
Display hinges (for non-touch displays) are available using spare part number L15539-001.
17. If it is necessary to replace the display cable, lift the cable from the routing path in the display enclosure.
The display cable is available in the Cable Kit, using spare part number L14370-001.
18. If it is necessary to replace the camera/ambient light sensor cable:
78 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
a. HD camera models
Disconnect the cable from the ambient light sensor board (1) and from the HD camera (2), and
then remove the cable from the display enclosure (3).
b. IR camera models
Disconnect the cable from the ambient light sensor board (1), from the left (2) and right (3) sides
of the IR camera, and then remove the cable from the display enclosure (4).
The camera cable is available in the Cable Kit using spare part number L14370-001.
Component replacement procedures 79
19. If it is necessary to replace the WLAN antenna cables, peel the antennas from the top of the display
enclosure (1), remove the antenna cables from the routing path on the bottom of the display enclosure
(2), and then remove the antenna cables (3).
NOTE: The WLAN antennas are spared with the display enclosure.
20. If it is necessary to replace the WWAN antenna cables, peel the antennas from the top of the display
enclosure (1), remove the antenna cables from the bottom and sides of the display enclosure (2), and
then remove the antenna cables (3).
NOTE: The WWAN antennas are spared with the display enclosure.
The display enclosure is available using spare part number L17823-001 for models without a WWAN
module and L17824-001 for models with a WWAN module.
Reverse this procedure to reassemble and install the display assembly.
80 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Top cover
The top cover remains after removing all other spared parts from the computer.
Description Spare part number
Top cover L17825-001
Component replacement procedures 81
7 Interpreting system validation diagnostic
front panel LEDs and audible codes
During the system validation phase that occurs at system startup, the BIOS validates the functionality of the
following subsystems and conditions:
●
AC adapter
●
System board power
●
Processor failure
●
BIOS corruption
●
Memory failure
●
Graphics failure
●
System board failure
●
BIOS authentication failure
If an error is detected, specic patterns of long and short blinks, accompanied by long and short beeps (where
applicable) are used to identify the error. These patterns will make up a two part code:
●
Major – the category of the error
●
Minor – the specic error within the category
NOTE: Single beep/blink codes are not used.
Number of long beeps/blinks Error category
1 Not used
2 BIOS
3 Hardware
4 Thermal
5 System board
Patterns of blink/beep codes are determined by using the following parameters:
●
1 second pause occurs after the last major blink.
●
2 second pause occurs after the last minor blink.
●
Beep error code sequences occur for the rst 5 iterations of the pattern and then stop.
●
Blink error code sequences continue until the computer is unplugged or the power button is pressed.
NOTE: Not all diagnostic lights and audible codes are available on all models.
82 Chapter 7 Interpreting system validation diagnostic front panel LEDs and audible codes
The red LED blinks to represent the major error category (long blinks). The white LED blinks to represent the
minor error category (short blinks). For example, ‘3.5’ indicates 3 long red blinks and 5 short white blinks to
communicate the processor is not detected.
Notebook
Component
tested
Major/
minor
code Error condition
Caps
Lock/Num
Lock LED Desktop Action
BIOS 2.2 The main area (DXE) of BIOS has
become corrupted and there is
no recovery binary image
available
2.3 The embedded controller policy
requires the user to enter a key
sequence (SureStart 2.0)
2.4 The embedded controller is
recovering the boot block or
DXE. Since it takes 10 sec. or so
to load the DXE image and get
video in the DXE case, this blink
code is necessary. (SureStart)
Hardware 3.2 The embedded controller has
timed out waiting for BIOS to
return from memory
initialization
3.3 The embedded controller has
timed out waiting for BIOS to
return from graphics
initialization ( 4/13- Graphics
adaptor not found)
CAP/NUM
Blink = 2
CAP/NUM
Blink = 8
Battery LED
White and
Amber
blinking
CAP/NUM
Blink = 3
CAP/NUM
Blink = 4
2.2 - Power
LED
(red.white)
2.3 - Power
LED
(red.white)
2.4 - Power
LED
(red.white)
3.2 - Power
LED
(red.white)
3.3 - Power
LED
(red.white)
Follow the Crisis Recovery instructions at
http://support.hp.com/us-en/document/
c02693833/.
If analysis of the event that caused Sure
Start recovery is desired, replace the
board and send the bad board back.
Otherwise, press this key combination to
restore BIOS and boot: Up Arrow+ Down
Arrow+ Esc.
Wait for DXE recovery to complete.
System board replacement.
If the system has an MXM module, try a
dierent MXM module. Otherwise, the
board most likely needs to be replaced.
3.4 The system board displays a
power failure (crowbar) *
System
board
5.3 The embedded controller has
5.2 The embedded controller cannot
nd valid rmware
timed out waiting for the BIOS
CAP/NUM
Blink = 5
CAP/NUM
Blink = 7 (2
BB failure)
Battery LED
Blinking = 1
Hz (3 B
failure)
CAP/NUM
Blink = 1
3.4 - Power
LED
(red.white)
5.2 - Power
LED
(red.white)
Not
implemented
System board replacement.
System board replacement.
System board replacement.
83
8 Troubleshooting guide
This chapter is primarily focused on troubleshooting HP Mobile Workstations and HP Notebooks. The
information is provided so that you can solve problems yourself or at least narrow down what may be causing
the problem. Based on some of the most common symptoms, this chapter helps to identify logical steps and
available resources or tools for resolving an issue. HP recommends that you follow the instructions carefully,
observe safety precautions, and note any observations or results. Capturing this information may help
identify and resolve the problem faster.
WARNING! To reduce the risk of electric shock or damage to the equipment:
●
Do not disable the power cord grounding plug. The grounding plug is an important safety feature.
●
Plug the power cord into a grounded (earthed) outlet that is easily accessible at all times.
●
Disconnect power from the equipment by unplugging the power cord from the AC outlet.
●
Before disassembling notebooks, always disconnect power and remove the battery.
CAUTION: Static electricity can damage the electronic components of the computer. To prevent damage to
the computer, carefully observe the electrostatic discharge precautions.
●
Discharge static electricity by briey touching a grounded metal object before you begin.
●
Work on a static-free mat.
●
Wear a static strap to ensure that any accumulated electrostatic charge is discharged from your body to
the ground.
●
Create a common ground for the equipment you are working on by connecting the static-free mat, static
strap, and peripheral units to that piece of equipment.
●
Refer to the Electrostatic Discharge Section of the Maintenance & Service Guide for more information.
CAUTION: The computer includes customer self-repair parts and parts that should only be accessed by an
authorized service provider. See the chapter titled "Removal and replacement procedures for Customer SelfRepair parts," for details. Accessing parts described in the chapter titled "Removal and replacement
procedures for authorized service provider only parts" can damage the computer or void the computer
warranty.
84 Chapter 8 Troubleshooting guide
Resources
HP Resource Tool Description Link
HP Elite Support Provides live HP Premium support (available 24/7) to
Elite computers.
HP Support Center Provides important support, such as warranty,
support cases, drivers, Customer Advisories,
Customer and Security Bulletins, and Product Change
Notices.
HP Troubleshooting Support page Provides troubleshooting information for your
specic HP computer.
Subscribers Choice Allows you to sign up for HP product updates. http://www8.hp.com/us/en/subscribe/
HP Support Forums Provide discussions about HP products and issues. http://h30434.www3.hp.com/psg/
Service Access Workbench (SAW)
(Available for technicians and
Business Partners only)
Vendors’ web sites Provide additional information for associated
Provides navigable content intended for use by
internal and outsourced call center sta and can be a
resource for support and product division
professionals.
components such as Intel (processor, WLAN),
Microsoft (Windows 7/8/10), AMD/NVidia (GPU), and
so on.
http://www8.hp.com/us/en/ads/eliteproducts/overview.html
http://h20565.www2.hp.com/portal/site/
hpsc
http://www8.hp.com/us/en/
troubleshooting.html
http://sawpro.atlanta.hp.com/km/saw/
home.do
http://www.intel.com/
content/www/us/en/homepage.html
http://www.microsoft.com
http://www.amd.com
http://www.nvidia.com
General troubleshooting steps
A basic logic should be used when troubleshooting computer issues. This section will help you become
familiar with troubleshooting methodology and eciently resolve problems. Proceed through the steps in the
following table until the issue is resolved, and then move on to the next step that is relevant to the issue. For
example, if you resolve a memory issue using the HP PC Diagnostics (UEFI) tool in step 6, you can then move
on to step 10 to reseat the memory into its memory slot.
NOTE: General troubleshooting steps do not have to be followed in a specic order if an issue does not
apply.
Table 8-1 Troubleshooting methodology and general troubleshooting steps
Identify issue Analyze issue Resolve issue Verify solution
1. Understand the issue
on page 86
2. Examine the environment
on page 88
3. Perform a visual inspection
of hardware on page 89
4. Update BIOS and drivers
on page 89
5. Remove or uninstall recently
added hardware, software
on page 89
6. HP Hardware Diagnostics and
Tools on page 90
7. Status lights, blinking light
codes, troubleshooting lights,
and POST error messages
on page 94
8. Hard reset on page 97
9. Soft reset (Default Settings)
on page 98
10. Reseat cables and connections
on page 98
11. Test with minimum conguration
on page 99
12. Test with veried working
conguration (hardware and/or operating
system) on page 100
Verify solution
on page 101
Resources 85
Table 8-1 Troubleshooting methodology and general troubleshooting steps
Identify issue Analyze issue Resolve issue Verify solution
Identify the issue
1. Understand the issue
It is important to understand the issue that occurred, including related symptoms. It helps to understand the
basic computer boot-up sequence as well as the failure itself. The boot-up sequence and associated failures
are described below.
Boot up sequence
The computer performs several steps after you press the power button or restart the computer.
It is important to understand where in the boot-up sequence the symptoms occur. The following table lists
the phases of the boot-up sequence and explains the symptoms that may occur in each phase. For example, a
blue screen error (BSOD) often occurs during the performance phase.
Table 8-2 Boot-up sequence
Item Procedure
13. Replace the system board on page 100
Power-on After power button is pressed, the computer boots after all internal power rails (i.e., 5V, 3.3V) are stable.
POST (UEFI/BIOS) Power-On Self-Test (POST) veries that hardware components (processor, hard drive, memory, etc.) are
Performance
(operating system)
Failure classication
Failure classication is a breakdown of dierent types of failures and symptoms that could occur during the
boot-up sequence. Table 3 and table 4 represent the failure classication for common notebook failures.
Table 3 categorizes failures by the boot-up sequence.
Conrm that power lights are on fan is spinning.
Next step: If the computer experiences a power-on issue, see “Verify Power Good (Troubleshooting) lights” in
No Power on page 103.
Common issues: all lights are o; troubleshooting lights are on; does not boot; video is absent.
functional. When POST is complete, the HP logo displays briey and then disappears.
If there are errors, the computer may exhibit blinking lights and POST error messages
Common issues: lights blink, error message appears, hangs.
System boots to operating system, and Windows logo screen appears..
Common issues: hangs (lock up/freezes), blue screen, video distorted, driver conict, slow performance,
display issue (dead pixel), I/O issue (no speaker sound), wireless/audio unavailable, noise.
See Analyze the issue on page 89 table below for detailed troubleshooting information).
1. Power-on: Common issues are No Power, Recycle/Reboot, etc.
2. POST: Common issues are No Boot (have power), Light Flash or Diagnostics Error.
3. Performance: Common issues are Intermittent Loss of Power, Blue Screen, Hang, etc. In many cases,
issues may be identied and associated with a particular hardware (i.e., display, storage).
86 Chapter 8 Troubleshooting guide
Table 4 categorizes failures by hardware.
4. Display
5. I/O devices (Input/Output)
6. Storage
7. Mechanical
A single symptom can be listed under dierent groups. For example, No Video can belong to (1) Power-on or
(4) Display; but Flickering when powered should be listed in (4) Display. Or, in another example, a blue screen
can be caused by a driver
conict in Performance (4), but it can also be caused by a defective hard drive under
(6) Storage. Therefore, failures that share similar symptoms are noted..
If possible, make a record of the failure symptom, the phase of the boot-up sequence where the failure
occurs, and the most likely location in the failure tree (Table 8-3 Failure classication by boot-up sequence
on page 87 and Table 8-4 Failure classication by hardware devices and mechanical on page 88). This will
help isolate the issue and indicate the next steps. For example, when the computer is running the operating
system, it may experience an issue with (4) Display, (5) I/O devices (keyboard, wireless, and so on), (6)
Storage, or (7) Mechanical components (stuck buttons, thermal shutdown, and so on).
NOTE: “Uncategorized” is used if an issue found is not listed. For example, Bluetooth is oered on certain
hardware congurations; therefore, a Bluetooth issue can be classied under “I/O Device” if needed.
Failure classication by boot-up sequence
Table
8-3 Failure classication by boot-up sequence
1. Power-on 2. POST 3. Performance
1. No Power on page 103
2. Intermittent power-on, shutdown,
reboot on page 105
3. AC adapter issue on page 107
4. Battery not recognized, not charging
on page 107
5. Battery discharges too fast
on page 109
6. Burnt smell on page 110
a,b,c
similar symptoms
a
1. No video (with power)
on page 110
2. Blinking lights on page 111
3. Diagnostics error messages
on page 112
4. BIOS password on page 113
1.
Intermittent shutdown on page 114
2.
Blue screen (BSOD) error on page 139
3. Freeze at Windows Logo (hang/lockup)
on page 117
4. Electromagnetic Interference (EMI)
on page 118
5. No wake up on page 119
6. Unresponsive on page 120
7.
Slow performance on page 120
8. HP Smart Adapter warning message
on page 121
9. Incorrect time and date on page 121
a
b
c
General troubleshooting steps 87
Failure classication by hardware devices and mechanical
Table 8-4 Failure classication by hardware devices and mechanical
4. Display 5. I/O devices 6. Storage 7. Mechanical
1. Display anomalies
on page 122
2. Dead pixel on page 124
3. No video (internal)
on page 124
4. No video (external)
on page 125
5. DisplayPort/VGA
on page 125
6. HDMI on page 125
7. No or bad external video
via docking on page 126
8. Incorrect or missing color/
distorted image
on page 126
9. Touch screen
on page 127
b,c,d
similar symptoms
d
d
1. Keyboard on page 128
2. Keyboard point stick
on page 129
3. Keyboard backlight
on page 129
4. TouchPad on page 130
5. Network Connectivity
Ethernet (RJ-45 jack)
on page 130
6. Network connectivity
wireless (WLAN)
on page 131
7. WWAN on page 132
8. USB on page 133
9. Smart card reader
on page 134
10. Speaker, headphone audio issues on page 135
11. Thunderbolt (TB)
on page 136
1. Hard drive/solid-state
drive not recognized
on page 138
2. No boot to operating
system (no read/write
error) on page 138
3. Read-write error
on page 139
4. Slow performance
on page 120
5. Blue screen (BSOD) error
on page 139
6. Noisy hard drive
on page 140
c
b
1. Fan error message - 90B
on page 141
2. Noise (sound)
on page 142
3. Fan runs constantly
on page 143
4. HP Thermal Monitor
on page 93
5. Stuck power button
on page 144
2. Examine the environment
It is important to examine the computer’s environment. If you can quickly identify the cause of the issue,
fewer resolution steps may be needed. Perform the following environment inspections:
●
Check all cables and connections to be sure that there are no loose connections.
●
Conrm that power sources are good, such as wall power type/adapter (110V/220V ac), power strip. Test
with a veried working AC outlet.
●
Check for compatibility issues between the computer and third-party devices, peripherals, noncertied
devices, incompatible hardware (i.e., Mac OS device). Incompatibility can result in blue screen errors,
improper operation, and so on.
●
Isolate the computer from sources of electromagnetic interference (EMI), such as cell phones, 2-way
radios, oor mats, fans (and other electronic motors). EMI may contribute to a display freeze issue or
lock-up.
88 Chapter 8 Troubleshooting guide
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