HP ProBook 450 G4, ProBook 455 G4 Maintenance and Service Guide

HP ProBook 450 G4 Notebook PC HP ProBook 455 G4 Notebook PC

Maintenance and Service Guide

© Copyright 2016 HP Development Company,

L.P.

AMD is a trademark of Advanced Micro Devices, Inc. Bluetooth is a trademark owned by its proprietor and used by HP Inc. under license. Intel is a trademark of Intel Corporation in the U.S. and other countries. Windows is a 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: September 2016

Document Part Number: 903116-001

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.

Your product does not support Windows 8 or Windows 7

In accordance with Microsoft’s support policy, HP does not support the Windows 8 or Windows 7 operating system on this product or provide any Windows 8 or Windows 7 drivers on http://support.hp.com.

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 computer, do not place the computer directly on your lap or obstruct the computer air vents. Use the computer only on a hard, flat 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 airflow. 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 computer and the AC adapter comply with the user-accessible surface temperature limits de ned 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 ..................................................................................................................................................	6
Right .......................................................................................................................................................................	6
Left .........................................................................................................................................................................	7
Display ....................................................................................................................................................................	8
Top ..........................................................................................................................................................................	9
TouchPad .............................................................................................................................................	9
Lights .................................................................................................................................................	10
Buttons, speakers, and ngerprint reader ........................................................................................	11
Special function keys ........................................................................................................................	12
Using the hot keys .............................................................................................................................	13
Bottom .................................................................................................................................................................	14
Labels ...................................................................................................................................................................	15
3 Illustrated parts catalog ..............................................................................................................................	16
Computer major components ..............................................................................................................................	16
Cable Kit ...............................................................................................................................................................	20
Display components ............................................................................................................................................	21
Plastics Kit ...........................................................................................................................................................	23
Mass storage devices ...........................................................................................................................................	24
Miscellaneous parts .............................................................................................................................................	25
4 Removal and replacement procedures preliminary requirements ....................................................................	27
Tools required ......................................................................................................................................................	27
Service considerations .........................................................................................................................................	27
Plastic parts .......................................................................................................................................	27
Cables and connectors ......................................................................................................................	28
Drive handling ...................................................................................................................................	28
Grounding guidelines ........................................................................................................................	29
Electrostatic discharge damage .....................................................................................	29
Packaging and transporting guidelines .......................................................	30
Workstation guidelines ................................................................................	30
Equipment guidelines ...................................................................................	31

vii

5 Removal and replacement procedures for Customer Self-Repair parts .............................................................	32
Component replacement procedures ..................................................................................................................	32
Battery Safe mode ............................................................................................................................	32
Service door .......................................................................................................................................	33
Optical drive .......................................................................................................................................	34
Hard drive ..........................................................................................................................................	36
Memory modules ...............................................................................................................................	38
WLAN/Bluetooth combo card ............................................................................................................	40
WWAN module ...................................................................................................................................	42
M.2 solid-state drive .........................................................................................................................	44
Keyboard ...........................................................................................................................................	45
6 Removal and replacement procedures for Authorized Service Provider parts ...................................................	48
Component replacement procedures ..................................................................................................................	48
Display subcomponents (bezel, webcam, panel) .............................................................................	48
Top cover ...........................................................................................................................................	52
Fingerprint reader assembly .............................................................................................................	56
Power button board ..........................................................................................................................	58
Function board ..................................................................................................................................	60
Speaker assembly .............................................................................................................................	62
TouchPad assembly ...........................................................................................................................	64
Battery ...............................................................................................................................................	66
USB/audio board ................................................................................................................................	68
Fan .....................................................................................................................................................	70
Optical drive connector cable ............................................................................................................	72
System board ....................................................................................................................................	74
RTC battery ........................................................................................................................................	77
Heat sink assembly ...........................................................................................................................	79
Display assembly ...............................................................................................................................	82
Power connector and cable ...............................................................................................................	89
7 Computer Setup (BIOS), TPM, and HP Sure Start .............................................................................................	91
Using Computer Setup .........................................................................................................................................	91
Starting Computer Setup ..................................................................................................................	91
Navigating and selecting in Computer Setup ...................................................................................	91
Restoring factory settings in Computer Setup .................................................................................	91
Updating the BIOS .............................................................................................................................	92
Determining the BIOS version .........................................................................................	92
Downloading a BIOS update ...........................................................................................	93
Changing the boot order using the f9 prompt ..................................................................................	93

viii

TPM BIOS settings (select products only) ...........................................................................................................	94
Using HP Sure Start (select products only) .........................................................................................................	94
8 Using HP PC Hardware Diagnostics (UEFI) .......................................................................................................	95
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device ....................................................................	95
Blink and beep codes ...........................................................................................................................................	96
9 Backup and recovery ....................................................................................................................................	97
Creating recovery media and backups ................................................................................................................	97
Creating HP Recovery media (select products only) .........................................................................	97
Using Windows tools ...........................................................................................................................................	98
Restore and recovery ...........................................................................................................................................	99
Recovering using HP Recovery Manager ...........................................................................................	99
What you need to know before you get started .............................................................	99
Using the HP Recovery partition (select products only) ..............................................	100
Using HP Recovery media to recover ............................................................................	100
Changing the computer boot order ..............................................................................	101
Removing the HP Recovery partition (select products only) .......................................	102
10 pec cat ons ..........................................................................................................................................	103
Computer speci cations ....................................................................................................................................	103
39.6-cm (15.6-in) display speci cations ..........................................................................................................	104
Hard drive speci cations ...................................................................................................................................	105
Solid-state drive speci cations .........................................................................................................................	106
DVD±RW SuperMulti DL Drive speci cations ....................................................................................................	107
Blu-ray ROM DVD±RW SuperMulti DL Drive .......................................................................................................	108
DVD-ROM drive ..................................................................................................................................................	109
11 Statement of memory volatility ................................................................................................................	110
Nonvolatile memory usage ...............................................................................................................................	113
Questions and answers .....................................................................................................................................	115
Using HP Sure Start (select models only) ..........................................................................................................	116
12 Power cord set requirements ....................................................................................................................	117
Requirements for all countries and regions ......................................................................................................	117
Requirements for speci c countries and regions .............................................................................................	117
13 Recycling ................................................................................................................................................	119
Index ...........................................................................................................................................................	120

ix

x

1Product description

Category	Description	450	450	455
		UMA	Discrete	UMA
Product Name	HP ProBook 450 G4 Notebook PC	√	√
	HP ProBook 455 G4 Notebook PC			√
Processors	7th generation, Intel® Core™ i7 processor, Dual Core (4-MB L3 cache, 15 W)x	√	√
	7500U, 2.7 GHz/3.5 GHz Single Core Turbo; Intel HD Graphics 620
	7th generation, Intel Core i5 processors, Dual Core (3-MB L3 cache, 15 W)
	7200U, 2.5-GHz/3.1-GHz Single Core Turbo processor; Intel HD Graphics 620
	7th generation, Intel Core i3 processors, Dual Core (3-MB L3 cache, 15 W)
	7100U, 2.4-GHz processor; Intel HD Graphics 620
	6th generation, Intel Core i3 processor, Dual Core (3-MB L3 cache, 15 W)
	6006U, 2.0-GHz processor; Intel HD Graphics 520
	AMD processors			√
	A10-9600P, 3.3-GHz processor, 2 MB L2 cache, quad core, 15W; Radeon R5
	Graphics
	A9-9410, 3.5-GHz processor, 1 MB L2 cache, dual core, 15W; Radeon R5 Graphics
	A6-9210, 2.8-GHz processor, 1 MB L2 cache, dual core, 15W; Radeon R4 Graphics
Graphics	Integrated UMA graphics GT1 and GT2	√
	Integrated with shared video memory, dynamically allocated
	Integrated UMA graphics			√
	Integrated with shared video memory, dynamically allocated
	Switchable discrete graphics		√
	Nvidia GeForce 930MX with 2 GB dedicated video memory
	Supports HD decode, DX12, HDMI
	Supports CUDA, Optimus, PhysX, GPU Boost 2.0
Panel	39.6-cm (15.6-inch), LED backlight, 16:9 aspect ratio, Anti-glare, HD, 1366x768,	√
	SVA, 220 nits, HD eDP - slim (3.2 mm)
	1 or 2 WLAN antennas
	Webcam, 1 or 2 WLAN antennas, WWAN
	39.6-cm (15.6-inch), LED backlight, 16:9 aspect ratio, Anti-glare, HD, 1366x768,
	SVA, 220 nits, HD eDP - slim (3.2 mm)
	Webcam, 1 or 2 WLAN antennas	√	√
	1 or 2 WLAN antennas			√
	Webcam, 1 or 2 WLAN antennas

1

Category	Description		450	450	455
			UMA	Discrete	UMA
	1 or 2 WLAN antennas		√
	Webcam, 1 or 2 WLAN antennas, WWAN
	39.6-cm (15.6-inch), LED backlight, 16:9 aspect ratio, HD, 1366x768, 220 nits,
	HD eDP - slim (3.2 mm)
	Touch panel, 1 or 2 WLAN antennas		√	√
	Touch panel, 1 or 2 WLAN antennas, 2 WWAN antennas		√
	39.6-cm (15.6-inch), LED backlight, 16:9 aspect ratio, Anti-glare, FHD,
	1920x1080, SVA, 220 nits, HD eDP - slim (3.2 mm)
	Webcam, 1 or 2 WLAN antennas		√	√
	1 or 2 WLAN antennas				√
	Webcam, 1 or 2 WLAN antennas
Memory	Two customer-accessible memory module slots supporting up to 16 GB of RAM		√	√	√
	Supports dual-channel memory
	PC4-17000, 2133-MHz, DDR4 SODIMMs
	NOTE: 450 models run at 2133 MHz; 455 models run at 1866 MHz
	Supports the following con gurations:
	● 16384 MB (8192 × 2; dual channel)
	● 12288 MB (8192 + 4096; dual channel)
	● 8192 MB (8192 × 1)
	● 8192 MB (4096 × 2; dual channel)
	● 4096 MB (4096 × 1)
Primary	Supports hard drives with HP 3D DriveGuard		√	√	√
storage	Customer-accessible
	Supports the following 7 mm/9.5 mm, 2.5 inch hard drives:
	●	2.0-TB, 5400-rpm
	●	1-TB, 5400-rpm
	●	500-GB, 7200-rpm
	● 500-GB, hybrid (8-GB SSD)
	●	500-GB, 5400-rpm
Fixed optical	Supports the following 9.5-mm SATA optical drives:		√	√
drives	●	DVD-ROM
	● DVD+/-RW SuperMulti DL
	● Blu-ray ROM DVD+/-RW SuperMulti DL
	Supports no optical drive option
	Supports the following 9.5-mm SATA optical drives:				√
	●	DVD-ROM

2Chapter 1 Product description

Category	Description		450	450	455
			UMA	Discrete	UMA
	●	DVD+/-RW SuperMulti DL
	Supports no optical drive option
Primary M.2	M.2 2280 SSD (NGFF), SATA-3		√	√
storage	Supports the following drives:
	●	256 GB
	●	128 GB

Set as primary storage if selected.

M.2 2280 SSD (NGFF), SATA-3

√

Supports the following drives:

	●	128 GB
	Set as primary storage if selected.
Audio/Visual	Audio controls		√	√	√
	Integrated camera (720p HD)
	Stereo speakers (2)
	Integrated dual-array microphone (webcam models only)
	Integrated mono microphone (non-webcam UMA models only)
	Headphone/microphone combo jack
Ethernet	Realtek RTL8111HSH 10/100/1000		√	√	√
	S3/S4/S5 wake on LAN (AC mode and battery mode)
Wireless	WLAN		√	√	√
	Integrated WLAN options by way of wireless module
	WLAN antennas built into display assembly
	Supports “no WLAN/Bluetooth” option
	●	Realtek RTL8723BE-VB 802.11b/g/n 1x1 Wi-Fi + Bluetooth 4.0 combination	√	√
		WLAN adapter
	●	Intel Dual Band Wireless-AC 3168 802.11ac, Dual Band, 1×1 Wi-Fi + Bluetooth
		4.0
	●	Intel Dual Band Wireless-AC 7265NV (non v-Pro) 802.11 ac 2×2 WiFi +
		Bluetooth 4.2 Combo Adapter
	●	Realtek RTL8723BE-VB 802.11b/g/n 1x1 Wi-Fi + Bluetooth 4.0 combination			√
		WLAN adapter
	●	Intel Dual Band Wireless-AC 3168 802.11ac, Dual Band, 1×1 Wi-Fi + Bluetooth
		4.0
	Wireless Personal Area Network (PAN) Bluetooth		√	√	√
	Bluetooth 4.0 supported using combo card
	WWAN		√
	SIM module: Micro SIM/3FF (user accessible under service door)
	WWAN options using connector

3

Category	Description	450	450	455
		UMA	Discrete	UMA
	Huawei HP It4132, LTE/HSPA+ w/GPS M.2
	WWAN antennas (2), worldwide, 5 band, con gured at top of panel
	Supports “No WWAN” option
External media	Digital Media Reader Slot	√	√	√
card	Supports SD, SDHC, SDXC
Ports	Headphone/microphone combo jack	√	√	√
	RJ-45 (Ethernet, includes link and activity lights)
	USB 3.0 (1)
	USB 2.0 (2)
	VGA (Dsub 15-pin) supporting 2048 × 1536 external resolution at 60-GHz (hot
	plug/unplug with auto-detect)
	HDMI 1.4
	Multi-pin AC port
Keyboard/	Keyboards	√	√	√
pointing	HP Premium Keyboard
devices
	Full-sized, chiclet, spill-resistant keyboard with numeric keypad (backlit or not
	backlit)
	Touchpad requirements
	Windows 10 gestures: taps enabled by default: on/o control by driver, 2-	nger
	scrolling and zoom enabled by default, OSD (enable/disable), 3- nger tap -
	Cortana, 3- nger flick - App switch, 4- nger tap - Action Center
Power	Power cords	√	√	√
requirements	3-wire plug - 1.8 m
	3-wire plug - 1.0 m
	2-wire plug - 1.0 m
	Battery
	3-cell, 48-Wh, 4.21-Whr Li-ion battery
	AC adapters
	65-W Smart AC adapter	√		√
	45-W Smart AC adapter	√	√	√
Security	Integrated ngerprint reader	√	√	√
	Supports “No ngerprint reader” option
	Security lock
	TPM 2.0 SLB9670 n neon; soldered down)
Operating	Operating system versionx	√	√	√
system	Windows 10: Threshold 2

Preinstalled

4Chapter 1 Product description

Category	Description	450	450	455
		UMA	Discrete	UMA
	Windows 10 Home 64
	Windows 10 Home 64 Single Language
	Windows 10 Home 64 StF MSNA for Higher Education - Strategic
	Windows 10 Home 64 High-end
	Windows 10 Home 64 High-end Single Language
	Windows 10 Professional 64
	Windows 10 Professional 64 - StF MSNA - Standard
	Windows 10 Professional 64 - StF MSNA - High End
	Windows 10 Professional 64 - StF MSNA - Strategic
	FreeDOS 2.0
	Restore Media (DRDVD/SRDVD)	√	√	√
	DRDVD Windows 10
	Restore Media (OSDVD)	√	√	√
	Windows 10 Professional 64
	Web-only support	√	√	√
	Windows 10 Enterprise
	ert ed	√	√	√
	Microsoft WHQL
Serviceability	End-user replaceable parts	√	√	√
	AC adapter
	Hard drive
	Optical drive
	M.2 solid-state drive
	Memory module
	WLAN module
	Keyboard

xYour product does not support Windows 8 or Windows 7. In accordance with Microsoft’s support policy, HP does not support the Windows 8 or Windows 7 operating system on this product or provide any Windows 8 or Windows 7 drivers on http://www.support.hp.com.

5

2Components

Right

Component		Description
(1)	Optical drive (select products only)	Depending on your computer model, reads an optical disc or reads and
		writes to an optical disc.
(2)	Optical drive eject button (select	Releases the optical drive disc tray.
	products only)
(3)	Audio-out (headphone)/Audio-in	Connects optional powered stereo speakers, headphones, earbuds, a
	(microphone) combo jack	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:
		1.	Type support in the taskbar search box, and then select the HP
			Support Assistant app.
			‒ or –
			Click the question mark icon in the taskbar.
		2.	Select My PC, select the pec cat ons tab, and then select User
			Guides.
		NOTE: When a device is connected to the jack, the computer speakers
		are disabled.
(4)	USB 2.0 ports (2)	Connect an optional USB device, such as a keyboard, mouse, external
		drive, printer, scanner or USB hub.
(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)	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.

6Chapter 2 Components

Left

Component		Description
(1)	Power connector	Connects an AC adapter.
(2)	Battery light	When AC power is connected:
		●	White: The battery charge is greater than 90 percent.
		●	Amber: The battery charge is from 0 to 90 percent.
		●	: 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.
		●	: The battery is not charging.
(3)	Vent	Enables airflow 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.
(4)	External monitor port	Connects an external VGA monitor or projector.
(5)	HDMI port	Connects an optional video or audio device, such as a high-
		de	nition television, any compatible digital or audio component,
		or a high-speed High De nition Multimedia Interface (HDMI)
		device.
(6)	USB 3.0 port	Connects an optional USB device, such as a keyboard, mouse,
		external drive, printer, scanner or USB hub.
(7)	USB Type-C charging port	Connects any USB device with a Type-C connector and can charge
		products such as cell phones, laptops, tablets, and MP3 players.
(8)	Memory card reader	Reads optional memory cards that store, manage, share, or
		access information.
(9)	Drive light	●	Blinking white: The hard drive is being accessed.
		●	Amber: HP 3D DriveGuard has temporarily parked the hard
			drive.

Left 7

Display

NOTE: Refer to the illustration that most closely matches your computer.

Component		Description
(1)	WLAN antennas* (select products only)	Send and receive wireless signals to communicate with wireless local
		area networks (WLANs).
(2)	WWAN antennas* (select products only)	Send and receive wireless signals to communicate with wireless wide
		area networks (WWANs).
(3)	Internal microphones (1 or 2 depending on model)	Record sound.
(4)	Webcam light (select products only)	On: The webcam is in use.
(5)	Webcam (select products only)	Records video and captures photographs. Some models allow you to

video conference and chat online using streaming video. To use the webcam:

▲ Type camera in the taskbar search box, and then select

Camera.

*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:

1.Type support in the taskbar search box, and then select the HP Support Assistant app.

‒ or –

Click the question mark icon in the taskbar.

2. Select My PC, select the pec cat ons tab, and then select User Guides.

8Chapter 2 Components

Top

TouchPad

Component		Description
(1)	TouchPad zone	Reads your nger gestures to move the pointer or activate
		items on the screen.
(2)	Left TouchPad button	Functions like the left button on an external mouse.
(3)	Right TouchPad button	Functions like the right button on an external mouse.

Top 9

Lights

Component		Description
(1)	Power light	●	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.
		●	: The computer is o or in Hibernation. Hibernation is a
			power-saving state that uses the least amount of power.
(2)	Caps lock light	On: Caps lock is on, which switches the key input to all capital
		letters.
(3)	Microphone mute light	●	Amber: microphone sound is o .
		●	: microphone sound is on.
(4)	Num lock light	On: Num lock is on.
(5)	Wireless light	On: An integrated wireless device, such as a wireless local 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 .
(6)	Mute light	●	Amber: Computer sound is o .
		●	White: Computer sound is on.

10 Chapter 2 Components

Buttons, speakers, and n erpr nt reader

Component		Description
(1)	Power button	●	When the computer is o , press the button to turn on the computer.
		●	When the computer is on, press the button briefly to initiate Sleep.
		●	When the computer is in the Sleep state, press the button briefly to
			exit Sleep.
		●	When the computer is in Hibernation, press the button briefly 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
		ine	ective, 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.
		▲	Type power in the taskbar search box, and then select Power and
			sleep settings.
			‒ or –
			Right-click the Start button, and then select Power Options.
(2)	Speakers (2)	Produce sound.
(3)	Wireless button	Turns the wireless feature on or o but does not establish a wireless
		connection.
		A wireless network must be set up before a wireless connection is
		possible.
(4)	Volume mute button	Mutes and restores speaker sound.
(5)	Fingerprint reader (select products	Allows a ngerprint logon to Windows, instead of a password logon.
	only)

Top 11

Special function 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 a function key, the num lock key, or the the
		esc key.
		See Using the hot keys on page 13.
(3)	Windows key	Opens the Start menu.
		NOTE: Pressing the Windows key again will close the Start
		menu.
(4)	num lock key	Alternates between the navigational and numeric functions on
		the integrated numeric keypad.
(5)	Integrated numeric keypad	A separate keypad to the right of the alphabet keyboard that
		enables you to add, subtract, and perform other numeric tasks.
		When num lock is on, the integrated keypad can be used like an
		external numeric keypad.

12 Chapter 2 Components

Using the hot keys

To use a hot key:

▲Press the fn key, and then press the correct function key represented by the icons below.

Press fn+function key Description

Initiates Sleep, which saves your information in system memory. The display and other system components turn o and power is conserved.

To exit Sleep, briefly press the power button.

CAUTION: To reduce the risk of information loss, save your work before initiating Sleep.

Turns the keyboard backlight o or on.

NOTE: To conserve battery power, turn o this feature.

Switches the screen image between display devices connected to the system. For example, if a monitor is connected to the computer, repeatedly pressing this key alternates the screen image from the computer display to the monitor display to a simultaneous display on both the computer and the monitor.

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.

Decreases speaker volume incrementally while you hold down the key.

Increases speaker volume incrementally while you hold down the key.

Mutes the microphone.

Top 13

Bottom

Component		Description
(1)	Service door	Provides access to the hard drive bay, the WLAN module
		slot, the WWAN module slot, the SIM card slot, and the
		memory module slots.
		CAUTION: To prevent an unresponsive system, replace
		the wireless module only with a wireless module
		authorized for use in the computer by the governmental
		agency that regulates wireless devices in your country or
		region. If you replace the module and then receive a
		warning message, remove the module to restore computer
		functionality, and then contact support.
		▲ Type support in the taskbar search box, and then
		select the HP Support Assistant app.
		- or -
		Click the question mark icon in the taskbar.
(2)	SIM card slot or locking hinged connector	Supports a wireless subscriber identity module (SIM) card.
	(select products only)	The SIM card slot or locking hinged connector is located
		under the service door.
(3)	Vents (2)	Enable airflow 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.

14 Chapter 2 Components

Labels

The labels affixed to the computer provide information you may need when you troubleshoot system problems or travel internationally with the computer.

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, or on the back of the display.

●Service label—Provides important information to identify your computer. When contacting support, you will probably be asked for the serial number, and possibly for the product number or the model number. Locate these numbers 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)Serial number

(2)Product number

(3)Warranty period

(4)Model number (select products only)

Component

(1)HP product name

(2)Product ID number

(3)Serial number

(4)Warranty period

●Regulatory label(s)—Provide(s) regulatory information about the computer.

●Wireless certi cation 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 15

3Illustrated 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 15 for details.

16 Chapter 3 Illustrated parts catalog

Item	Description	Spare part number
(1a)	Display panel assembly, touch
	Touch display are only spared as entire hinge-ups. Individual components are not spared.
	Models without WWAN	907724-001
	Models with WWAN	907725-001
(1b)	Display panel assembly, non-touch
	Non-touch displays are ONLY spared at the subcomponent level. For more information about
	display components, see Display components on page 21.

(2)Keyboard (includes cable)

NOTE: For a detailed list of keyboard country codes, see Keyboard on page 45.

	No backlight	827028-xxx
	Backlit	827029-xxx
(3)	Power button board	905754-001
(4)	Top cover (includes touchpad assembly)	905765-001
(5)	Function board	905753-001
(6)	Fingerprint reader assembly (includes cable)	905772-001
(7)	Speaker assembly	905773-001
(8)	Battery, Li-ion (4-cell, 48 WHr, 4.21 Ah)	851610-855
(9)	Fan	905774-001
(10)	USB/audio board	905755-001
(11)	Optical drive cable and connector	905769-001
	NOTE: The optical drive cable and connector is included in the Cable Kit.
(12)	Power connector cable	828949-007
	Conductive fabric (for use with the power connector cable)	914604-001

(13)System board (includes replacement thermal material) All system boards use the following part numbers: xxxxxx-001: Non-Windows operating system xxxxxx-601: Windows 10 operating system

For use in HP ProBook 450 G4 models:

● Intel Core i7-7500U processor; 2-GB discrete graphics memory	907715-xxx
● Intel Core i5-7200U processor; 2-GB discrete graphics memory	907714-xxx
● Intel Core i3-7100U processor; 2-GB discrete graphics memory	907713-xxx
● Intel Core i7-7500U processor; UMA graphics memory	907712-xxx
● Intel Core i5-7200U processor; UMA graphics memory	907713-xxx
● Intel Core i5-7200U processor; UMA graphics memory, WWAN models	907711-xxx
● Intel Core i3-7100U processor; UMA graphics memory	907702-xxx

Computer major components 17

Item	Description		Spare part number
	●	Intel Core i3-6006U processor; UMA graphics memory	913957-xxx
	For use in HP ProBook 455 G4 models:
	●	AMD A10-9600P	907356-xxx
	●	AMD A9-9410	907358-xxx
	●	AMD A6-9210	907357-xxx
(14)	Heat sink assembly (discrete model shown; includes replacement thermal material)
	Discrete graphics models		907364-001
	UMA graphics models		907359-001
(15)	RTC battery		not spared
(16)	Base enclosure		905764-001

(17)WLAN module

For use in all models:

●	Realtek RTL8723BE-VB 802.11b/g/n 1x1 Wi-Fi + Bluetooth 4.0 combination WLAN adapter	843338-001
●	Intel Dual Band Wireless-AC 7265NV (non v-Pro) 802.11 ac 2×2 WiFi + Bluetooth 4.2 Combo	860883-001
	Adapter
For use in HP ProBook 450 models:
●	Intel Dual Band Wireless-AC 3168 802.11ac, Dual Band, 1×1 Wi-Fi + Bluetooth 4.0	852511-001

(18)Memory modules (PC4-17000)

	8-GB		862398-850
	4-GB		862397-850
(19)	WWAN module
	Huawei HP It4132, LTE/HSPA+ w/GPS M.2		845710-001
(20)	Solid-state drive, M.2 (includes bracket)
	For use in HP ProBook 450 G4 models:
	●	256-GB	907722-001
	●	128-GB	907723-001
	For use in HP ProBook 455 G4 models:
	●	128-GB	907360-xxx
(21)	Hard drive
	For use in all models:
	● 2 TB, 5400 rpm, 9.5 mm		801808-001
	● 1 TB, 5400 rpm, 7 mm		778192-001
	● 500 GB, 7200 rpm, 7 mm		778189-001
	For use in HP ProBook 450 G4 models:
	● 500 GB, 5400 rpm, 7 mm		778187-001

18 Chapter 3 Illustrated parts catalog

Item	Description		Spare part number
	●	500 GB, 5400 rpm, 7 mm, hybrid (8-GB SSD)	732000-001
	For use in HP ProBook 455 G4 models:
	●	500 GB, 7200 rpm, 7 mm	703267-001
	●	500 GB, 5400 rpm, 7 mm	778186-001
(22)	Hard drive cover		905771-001
	NOTE: The hard drive cover is included in the Hard Drive Hardware Kit.
(23)	Service door		905771-001
	NOTE: The service door is included in the Hard Drive Hardware Kit
(24)	Optical drive
	For use in HP ProBook 450 G4 models:
	●	Blu-ray Disc R/RW with SuperMulti Drive	907719-001
	●	DVD+/-RW Double-Layer SuperMulti Drive	907721-001
	●	DVD-ROM Drive	907720-001
	For use in HP ProBook 455 G4 models:
	●	DVD+/-RW Double-Layer SuperMulti Drive	907606-001
	●	DVD-ROM Drive	907605-001

Computer major components 19

Cable Kit

Item	Description	Spare part number
	Cable Kit	906000-001

(1)USB board cable

(2)TouchPad cable

(3)Power button board cable

(4)Optical drive cable

(5)Function board cable

20 Chapter 3 Illustrated parts catalog