Hp 400 G4 User Manual
Maintenance & Service Guide
HP ProOne 400 23.8-inch G4 All-in-One Business PC
HP ProOne 400 20-inch G4 All-in-One Business PC
© Copyright 2018 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, Celeron, and Pentium 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.
This document contains proprietary
information that is protected by copyright. No
part of this document may be photocopied,
reproduced, or translated to another language
without the prior written consent of HP
Development Company.
First Edition: June 2018
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.
Document Part Number: L20659-001
About This Book
WARNING! Text set o in this manner indicates that failure to follow directions could result in bodily harm or
loss of life.
CAUTION: Text set o in this manner indicates that failure to follow directions could result in damage to
equipment or loss of information.
NOTE: Text set o in this manner provides important supplemental information.
iii
iv About This Book
Table of contents
1 Product features ........................................................................................................................................... 1
Overview ................................................................................................................................................................ 1
HP ProOne 400 23.8-inch components ................................................................................................................. 2
Front components ............................................................................................................................... 2
Side components ................................................................................................................................. 2
Rear components ................................................................................................................................ 3
Bottom components ............................................................................................................................ 3
HP ProOne 400 20-inch components .................................................................................................................... 4
Front components ............................................................................................................................... 4
Side components ................................................................................................................................. 4
Rear components ................................................................................................................................ 5
Bottom components ............................................................................................................................ 5
Labels ..................................................................................................................................................................... 6
2 Illustrated parts catalog ................................................................................................................................ 8
System parts .......................................................................................................................................................... 8
Mass storage devices ........................................................................................................................................... 11
Processors and memory modules ....................................................................................................................... 12
Keyboards and mice ............................................................................................................................................. 12
3 Routine care, SATA drive guidelines, and disassembly preparation .................................................................. 14
Electrostatic discharge information .................................................................................................................... 14
Generating static ............................................................................................................................... 14
Preventing electrostatic damage to equipment ............................................................................... 15
Personal grounding methods and equipment .................................................................................. 15
Grounding the work area ................................................................................................................... 15
Recommended materials and equipment ........................................................................................ 16
Operating guidelines ........................................................................................................................................... 16
Routine care ......................................................................................................................................................... 17
General cleaning safety precautions ................................................................................................ 17
Cleaning the Computer Case ............................................................................................................. 17
Cleaning the keyboard ....................................................................................................................... 17
Cleaning the display .......................................................................................................................... 18
Cleaning the mouse ........................................................................................................................... 18
Service considerations ......................................................................................................................................... 18
Tools and software requirements ..................................................................................................... 18
v
Screws ............................................................................................................................................... 18
Cables and connectors ...................................................................................................................... 18
Hard Drives ........................................................................................................................................ 19
Lithium coin cell battery .................................................................................................................... 19
SATA hard drive cables ......................................................................................................................................... 20
SATA data cable ................................................................................................................................. 20
Cable management .............................................................................................................................................. 20
4 Removal and Replacement Procedures .......................................................................................................... 21
Preparing to disassemble the computer ............................................................................................................. 21
Stand .................................................................................................................................................................... 21
VESA bracket ........................................................................................................................................................ 22
Rear port cover .................................................................................................................................................... 23
Locating internal components under the rear port cover ................................................................................... 23
Hard drive ............................................................................................................................................................. 24
Optical drive ......................................................................................................................................................... 26
M.2 solid-state drive ............................................................................................................................................ 28
Memory ................................................................................................................................................................ 29
Battery ................................................................................................................................................................. 31
WLAN module ...................................................................................................................................................... 32
Option board ........................................................................................................................................................ 33
Hood sensor ......................................................................................................................................................... 34
Fan assembly ....................................................................................................................................................... 35
Heat sink .............................................................................................................................................................. 36
Processor ............................................................................................................................................................. 38
System board ....................................................................................................................................................... 39
System board callouts ......................................................................................................................................... 41
Speakers .............................................................................................................................................................. 42
23.8-models ...................................................................................................................................... 42
20-models ......................................................................................................................................... 43
Power button board ............................................................................................................................................. 45
Rear enclosure and display assembly ................................................................................................................. 47
Rear enclosure and display assembly in 23.8-inch models ............................................................. 47
Display panel in 20-inch models ....................................................................................................... 50
Webcam ............................................................................................................................................................... 54
23.8-inch models .............................................................................................................................. 54
20-inch models ................................................................................................................................. 57
Antennas in 23.8-inch models ............................................................................................................................. 58
5 Computer Setup (F10) Utility ........................................................................................................................ 59
Computer Setup (F10) Utilities ............................................................................................................................ 59
vi
Using Computer Setup (F10) Utilities ................................................................................................ 59
Computer Setup–Main ....................................................................................................................... 61
Computer Setup—Security ............................................................................................................... 63
Computer Setup—Advanced ............................................................................................................. 67
Recovering the conguration settings ................................................................................................................ 72
6 Using HP PC Hardware Diagnostics ................................................................................................................ 73
Using HP PC Hardware Diagnostics Windows (select products only) ................................................................. 73
Downloading HP PC Hardware Diagnostics Windows ....................................................................... 73
Downloading the latest HP PC Hardware Diagnostics Windows version ....................... 74
Downloading HP Hardware Diagnostics Windows by product name or number
(select products only) ..................................................................................................... 74
Installing HP PC Hardware Diagnostics Windows ............................................................................. 74
Using HP PC Hardware Diagnostics UEFI ............................................................................................................. 74
Starting HP PC Hardware Diagnostics UEFI ....................................................................................... 75
Downloading HP PC Hardware Diagnostics UEFI to a USB ash drive .............................................. 75
Downloading the latest HP PC Hardware Diagnostics UEFI version .............................. 75
Downloading HP PC Hardware Diagnostics UEFI by product name or number
(select products only) ..................................................................................................... 75
Using Remote HP PC Hardware Diagnostics UEFI settings (select products only) ............................................. 76
Downloading Remote HP PC Hardware Diagnostics UEFI ................................................................. 76
Downloading the latest Remote HP PC Hardware Diagnostics UEFI version ................. 76
Downloading Remote HP PC Hardware Diagnostics UEFI by product name or
number ............................................................................................................................ 76
Customizing Remote HP PC Hardware Diagnostics UEFI settings .................................................... 76
7 Troubleshooting without diagnostics ............................................................................................................ 78
Safety and comfort .............................................................................................................................................. 78
Before you call for technical support .................................................................................................................. 78
Helpful hints ........................................................................................................................................................ 79
Solving general problems .................................................................................................................................... 80
Solving power problems ...................................................................................................................................... 83
Solving hard drive problems ................................................................................................................................ 84
Solving audio problems ....................................................................................................................................... 86
Solving printer problems ..................................................................................................................................... 87
Solving keyboard and mouse problems .............................................................................................................. 88
Solving hardware installation problems ............................................................................................................. 89
Solving network problems .................................................................................................................................. 90
Solving memory problems .................................................................................................................................. 92
Solving USB ash drive problems ........................................................................................................................ 94
Solving Internet access problems ....................................................................................................................... 94
vii
Solving software problems .................................................................................................................................. 95
8 Backing up, restoring, and recovering ........................................................................................................... 97
Using Windows tools ........................................................................................................................................... 97
Creating HP Recovery media (select products only) ........................................................................................... 97
Using HP Recovery Manager to create recovery media .................................................................... 98
Before you begin ............................................................................................................. 98
Creating the recovery media ........................................................................................... 98
Using the HP Cloud Recovery Download Tool to create recovery media .......................................... 99
Restoring and recovery ........................................................................................................................................ 99
Restoring, resetting, and refreshing using Windows tools .............................................................. 99
Restoring using HP Recovery Manager and the HP Recovery partition ........................................... 99
Recovering using HP Recovery Manager ........................................................................................... 99
Recovering using the HP Recovery partition (select products only) .............................................. 100
Recovering using HP Recovery media ............................................................................................. 100
Changing the computer boot order ................................................................................................ 101
Removing the HP Recovery partition (select products only) .......................................................... 101
9 POST error messages and diagnostic front panel LEDs and audible codes ....................................................... 102
POST numeric codes and text messages .......................................................................................................... 102
Interpreting system validation diagnostic front panel LEDs and audible codes .............................................. 107
10 Password security and resetting CMOS ...................................................................................................... 109
Resetting the password jumper ........................................................................................................................ 109
Clearing and resetting the BIOS ........................................................................................................................ 111
Appendix A Power cord set requirements ....................................................................................................... 112
General requirements ........................................................................................................................................ 112
Japanese power cord requirements .................................................................................................................. 112
Country-specic requirements .......................................................................................................................... 113
Appendix B Statement of memory volatility ................................................................................................... 114
Nonvolatile memory usage ............................................................................................................................... 116
Questions and answers ..................................................................................................................................... 118
Using HP Sure Start (select models only) .......................................................................................................... 119
Appendix C Specications ............................................................................................................................. 120
Index ........................................................................................................................................................... 121
viii
1 Product features
Overview
NOTE: For the latest manuals on this product, go to http://www.hp.com/support. Select Find your product,
and then follow the on-screen instructions.
Overview 1
HP ProOne 400 23.8-inch components
Front components
Component Component
1 Webcam microphones (2) (optional) 4 Webcam/IR lens (optional)
2 IR LED (optional) 5 IR LED (optional)
3 Webcam LED (optional) 6 Speakers (2) (optional)
Side components
Component Component
1 Optical disc drive (optional) 5 USB 3.1 Type-C port
2 Optical disc drive light (optional) 6 USB 3.1 Type-A (charging) port
3 Optical disc drive eject button (optional) 7 USB 3.1 Type-A port
4 SD card reader (optional) 8 Audio-out (headphone)/Audio-in (microphone) combo jack
2 Chapter 1 Product features
Rear components
Component Component
1 DisplayPort port (optional)
– or –
HDMI port (optional)
– or –
Serial port (optional)
2 USB 3.1 Type-A ports (2) 5 Power connector
3 DisplayPort port 6 Security cable slot
Bottom components
4 RJ-45 (network) jack
Component Component
1 Power button 3 Hard drive activity light
2 Power light
HP ProOne 400 23.8-inch components 3
HP ProOne 400 20-inch components
Front components
Component Component
1 Webcam LED 3 Webcam microphone
2 Webcam lens 4 Speakers (2) (optional)
Side components
Component Component
1 Optical disc drive (optional) 5 USB 3.1 Type-C port
2 Optical disc drive light (optional) 6 USB 3.1 Type-A (charging) port
3 Optical disc drive eject button (optional) 7 USB 3.1 Type-A port
4 SD card reader (optional) 8 Audio-out (headphone)/Audio-in (microphone) combo jack
4 Chapter 1 Product features
Rear components
Component Component
1 DisplayPort port (optional)
– or –
HDMI port (optional)
– or –
Serial port (optional)
2 USB 3.1 Type-A ports (2) 5 Power connector
3 DisplayPort port 6 Security cable slot
Bottom components
4 RJ-45 (network) jack
Component Component
1 Power button 3 Hard drive activity light
2 Power light
HP ProOne 400 20-inch components 5
Labels
The labels axed to the computer provide information you may need when you troubleshoot system
problems or travel internationally with the computer.
IMPORTANT: All labels described in this section will be located under the stand or axed to the bottom of
the computer.
1. You may need the Product Key to update or troubleshoot the operating system. HP platforms
preinstalled with Windows do not have the physical label, but have a Digital Product Key electronically
installed.
NOTE: This Digital Product Key is automatically recognized and activated by Microsoft Operating
Systems on a reinstall of the Windows operating system with HP-approved recovery methods.
2. 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.
Component
(1) Serial number
(2) Product number
(3) Warranty period
6 Chapter 1 Product features
3. Look for the serial number label in the following locations:
Labels 7
2 Illustrated parts catalog
Component appearance may vary.
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.
System parts
Item Description
(1) Rear port cover (available for models with the following expansion port: DisplayPort, HDMI, serial, or no expansion port)
(2) Adjustable height stand
(3) Fixed height stand
Heat sink (thermal module) (includes replacement thermal material)
(4) For use in models with discrete graphics memory
(5) For use in models with UMA graphics memory and up to 65 W processors
For use in models with UMA graphics memory and 35 W processors
(6) Speakers (left and right)
(7) Speaker cover (for use only in 23.8-inch models)
(8) System board (separate system boards available for models with discrete graphics memory or UMA graphics memory)
8 Chapter 2 Illustrated parts catalog
Item Description
(9) Fan
(10) Optical drive carrier
NOTE: Optical drives are spared separately from the optical drive carrier.
* Optical drive
BD writer drive
DVD±RW drive
DVD-ROM drive
(11) Option board
DisplayPort
HDMI
Serial
(12) Power button board (includes holder)
(13) Bezel (for use in 20-inch models)
(14) Webcam module with bracket and microphone module (for use only in 23.8-inch models)
Webcam modules available in FHD (1080p), FHD+IR (1080p), and HD (720p)
(15) Webcam module and microphone module (for use only in 20-inch models)
Webcam modules available in FHD (1080p), FHD+IR (1080p), and HD (720p)
* Rear enclosure and display assembly (includes display panel, back plastic panel, panel frame, system board basepan,
webcam frame assembly, webcam module, microphone modules, webcam cable, and wireless cables and antennas)
NOTE: Dierent assemblies are required depending on whether the computer has a 35 W processor or a 65 W processor.
For use in 23.8-inch models with an HD webcam
For use in 23.8-inch models with an FHD webcam
For use in 23.8-inch models with an FHD+IR webcam
For use in 23.8-inch models without a webcam
For use in 20-inch models
* RTC battery
* Cables
LVDS display cable (for use only in 20-inch models)
Webcam cable (for use only in 20-inch models)
Backlight cable, SDC (for use only in 20-inch models)
Backlight cable, INX (for use only in 20-inch models)
Power button board cable
Hard drive SATA cable
DVI monitor cable
* AC adapter
System parts 9
Item Description
150 W, PFC, straight
120 W, PFC, 7.4 mm
90 W, PFC, 7.4 mm
* WLAN modules
Intel Dual Band Wireless-AC 9560 802.11 AC 2x2 WiFi + Bluetooth 5.0 Combo Adapter (vPro)
Intel Dual Band Wireless-AC 9560 802.11 AC 2x2 WiFi + Bluetooth 5.0 Combo Adapter (non-vPro)
Realtek RTL8821CE 802.11 ac 1x1 WiFi + BT 4.2 Combo Adapter (MU-MIMO supported)
Realtek RTL8822BE 802.11 ac 2x2 WiFi + BT 4.2 Combo Adapter (MU-MIMO supported)
* Hood sensor
* Adapters
USB to serial adapter
USB-C to USB 3.0 adapter
DisplayPort to VGA
DisplayPort to DVI
DisplayPort to HDMI 2.0
* Optical drive blank (for use in models without an optical drive)
* Covers
Optical drive cover (for use in models without an optical drive)
Webcam cover (for use in models without a webcam)
Card reader cover (for use in models without a card reader)
* VESA kit (for use in models without a stand)
* USB-C to USB-A hub
* Power cord
10 Chapter 2 Illustrated parts catalog
Mass storage devices
Description
Optical drive
BD writer drive
DVD±RW drive
DVD-ROM drive
Hard drive
2 TB, 5400 rpm, hybrid SSD drive, 7 mm
2 TB, 5400 rpm, 7 mm
1 TB, 5400 rpm, hybrid SSD drive, 9.5 mm
1 TB, 7200 rpm, 9.5 mm
500 GB, 5400 rpm, hybrid SSD drive, 7 mm
500 GB, 7200 rpm hard drive, self-encrypting (SED), Opal 2, 7 mm
500 GB, 7200 rpm, 7 mm
500 GB, 7200 rpm hard drive, FIPS, 7 mm
Solid-state drive (SATA-3, TLC, 2.5-inch)
512-GB
512-GB, self-encrypting (SED), Opal 2
512-GB, FIPS 140-2
256-GB
256-GB, self-encrypting (SED), Opal 2
256-GB, FIPS 140-2
Solid-state drive (M.2, PCIe)
1-TB, TLC
512-GB, TLC
512-GB
512-GB, self-encrypting (SED), TLC
256-GB, TLC
256-GB, self-encrypting (SED), TLC
128-GB, TLC
128-GB
Optane memory module, 118 GB
Optane memory module, 16 GB
Mass storage devices 11
Processors and memory modules
Description
Memory modules (SODIMM; PC4-2400)
16-GB
8-GB
4-GB
Intel Processors (include replacement thermal material)
Intel Core i7-8700
Intel Core i7-8700T
Intel Core i5-8600
Intel Core i5-8600T
Intel Core i5-8500
Intel Core i5-8500T
Intel Core i3-8300T
Intel Core i3-8100T
Intel Core i3-8033
Intel Core i3-8011
Intel Pentium G5600
Intel Pentium G5500
Intel Pentium G5500T
Intel Pentium G5400T
Intel Celeron G4900
Intel Celeron G4900T
Keyboards and mice
Description
Keyboard
Washable, USB PS2
USB, unbranded
USB
USB, essential
Conferencing
USB, slim
Wireless, with mouse
12 Chapter 2 Illustrated parts catalog
Description
USB, slim, smart card
Antimicrobial
USB, slim, gray
USB, collaboration
Wireless, collaboration
USB, wired, healthcare
Premium, wireless
USB, Katydid
Mouse
USB, healthcare
USB, gray
USB, antimicrobial
USB/PS2 Washable
Hardened
USB, optical
USB
USB, laser
Keyboards and mice 13
3 Routine care, SATA drive guidelines, and
disassembly preparation
This chapter provides general service information for the computer. Adherence to the procedures and
precautions described in this chapter is essential for proper service.
CAUTION: When the computer is plugged into an AC power source, voltage is always applied to the system
board. You must disconnect the power cord from the power source before opening the computer to prevent
system board or component damage.
Electrostatic discharge information
A sudden discharge of static electricity from your nger or other conductor can destroy static-sensitive
devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device
exposed to electrostatic discharge (ESD) may not appear to be aected at all and can work perfectly
throughout a normal cycle. The device may function normally for a while, but it has been degraded in the
internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many cases, the discharge
contains enough power to alter device parameters or melt silicon junctions.
Generating static
The following table shows that:
●
Dierent activities generate dierent amounts of static electricity.
●
Static electricity increases as humidity decreases.
Relative Humidity
Event 55% 40% 10%
Walking across carpet
Walking across vinyl oor
Motions of bench worker
Removing DIPs from plastic tube
Removing DIPs from vinyl tray
Removing DIPs from Styrofoam
Removing bubble pack from PCB
Packing PCBs in foam-lined box
These are then multi-packaged inside plastic tubes, trays, or Styrofoam.
7,500 V
3,000 V
400 V
400 V
2,000 V
3,500 V
7,000 V
5,000 V
15,000 V
5,000 V
800 V
700 V
4,000 V
5,000 V
20,000 V
11,000 V
35,000 V
12,000 V
6,000 V
2,000 V
11,500 V
14,500 V
26,500 V
21,000 V
NOTE: 700 volts can degrade a product.
14 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Preventing electrostatic damage to equipment
Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of
sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric
components and accessories.
●
To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.
●
Protect all electrostatic parts and assemblies with conductive or approved containers or packaging.
●
Keep electrostatic sensitive parts in their containers until they arrive at static-free stations.
●
Place items on a grounded surface before removing them from their container.
●
Always be properly grounded when touching a sensitive component or assembly.
●
Avoid contact with pins, leads, or circuitry.
●
Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive
foam.
Personal grounding methods and equipment
Use the following equipment to prevent static electricity damage to equipment:
●
Wrist straps are exible straps with a maximum of one-megohm ± 10% resistance in the ground cords.
To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be
connected and t snugly into the banana plug connector on the grounding mat or workstation.
●
Heel straps/Toe straps/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 them on both feet with
a maximum of one-megohm ± 10% resistance between the operator and ground.
Static Shielding Protection Levels
Method Voltage
Antistatic plastic
Carbon-loaded plastic
Metallized laminate
Grounding the work area
To prevent static damage at the work area, use the following precautions:
●
Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to the
work surface and properly grounded tools and equipment.
●
Use static-dissipative mats, foot straps, or air ionizers to give added protection.
●
Handle electrostatic sensitive components, parts, and assemblies by the case or PCB laminate. Handle
them only at static-free work areas.
●
Turn o power and input signals before inserting and removing connectors or test equipment.
1,500
7,500
15,000
●
Use xtures made of static-safe materials when xtures must directly contact dissipative surfaces.
●
Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam.
●
Use eld service tools, such as cutters, screwdrivers, and vacuums, that are conductive.
Electrostatic discharge information 15
Recommended materials and equipment
Materials and equipment that are recommended for use in preventing static electricity include:
●
Antistatic tape
●
Antistatic smocks, aprons, or sleeve protectors
●
Conductive bins and other assembly or soldering aids
●
Conductive foam
●
Conductive tabletop workstations with ground cord of one-megohm +/- 10% resistance
●
Static-dissipative table or oor mats with hard tie to ground
●
Field service kits
●
Static awareness labels
●
Wrist straps and footwear straps providing one-megohm +/- 10% resistance
●
Material handling packages
●
Conductive plastic bags
●
Conductive plastic tubes
●
Conductive tote boxes
●
Opaque shielding bags
●
Transparent metallized shielding bags
●
Transparent shielding tubes
Operating guidelines
To prevent overheating and to help prolong the life of the computer:
●
Keep the computer away from excessive moisture, direct sunlight, and extremes of heat and cold.
●
Operate the computer on a sturdy, level surface. Leave a 10.2-cm (4-inch) clearance on all vented sides
of the computer and above the display to permit the required airow.
●
Never restrict the airow into the computer by blocking any vents or air intakes. Do not place the
keyboard, with the keyboard feet down, directly against the front of the desktop unit as this also
restricts airow.
●
Occasionally clean the air vents on all vented sides of the computer. Lint, dust, and other foreign matter
can block the vents and limit the airow. Be sure to unplug the computer before cleaning the air vents.
●
Never operate the computer with the cover or side panel removed.
●
Do not stack computers on top of each other or place computers so near each other that they are subject
to each other’s re-circulated or preheated air.
●
If the computer is to be operated within a separate enclosure, intake and exhaust ventilation must be
provided on the enclosure, and the same operating guidelines listed above will still apply.
●
Keep liquids away from the computer and keyboard.
16 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
●
Never cover the ventilation slots on the display with any type of material.
●
Install or enable power management functions of the operating system or other software, including
sleep states.
Routine care
General cleaning safety precautions
1. Never use solvents or ammable solutions to clean the computer.
2. Never immerse any parts in water or cleaning solutions; apply any liquids to a clean cloth and then use
the cloth on the component.
3. Always unplug the computer when cleaning with liquids or damp cloths.
4. Always unplug the computer before cleaning the keyboard, mouse, or air vents.
5. Disconnect the keyboard before cleaning it.
6. Wear safety glasses equipped with side shields when cleaning the keyboard.
Cleaning the Computer Case
Follow all safety precautions in General cleaning safety precautions on page 17 before cleaning the computer.
To clean the computer case, follow the procedures described below:
●
To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab.
●
For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well by wiping it with a cloth
or swab dampened with clear water.
●
For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the alcohol will evaporate
quickly and not leave a residue.
●
After cleaning, always wipe the unit with a clean, lint-free cloth.
●
Occasionally clean the air vents on the computer. Lint and other foreign matter can block the vents and
limit the airow.
Cleaning the keyboard
Follow all safety precautions in General cleaning safety precautions on page 17 before cleaning the keyboard.
To clean the tops of the keys or the keyboard body, follow the procedures described in Cleaning the Computer
Case on page 17.
When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 17
before following these procedures:
CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the
keys.
●
Visible debris underneath or between the keys may be removed by vacuuming or shaking.
●
Canned, pressurized air may be used to clean debris from under the keys. Caution should be used as too
much air pressure can dislodge lubricants applied under the wide keys.
Routine care 17
●
If you remove a key, use a specially designed key puller to prevent damage to the keys. This tool is
available through many electronic supply outlets.
CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are
improperly removed or installed, the keyboard may not function properly.
●
Cleaning under a key may be done with a swab moistened with isopropyl alcohol and squeezed out. Be
careful not to wipe away lubricants necessary for proper key functions. Use tweezers to remove any
bers or dirt in conned areas. Allow the parts to air dry before reassembly.
Cleaning the display
●
Wipe the display screen with a clean cloth moistened with water or with a towelette designed for
cleaning displays. Do not use sprays or aerosols directly on the screen; the liquid may seep into the
housing and damage a component. Never use solvents or ammable liquids on the display.
●
To clean the display body follow the procedures in Cleaning the Computer Case on page 17.
Cleaning the mouse
Before cleaning the mouse, ensure that the power to the computer is turned o.
●
Clean the mouse ball by rst removing the retaining plate and the ball from the housing. Pull out any
debris from the ball socket and wipe the ball with a clean, dry cloth before reassembly.
●
To clean the mouse body, follow the procedures in Cleaning the Computer Case on page 17.
Service considerations
Listed below are some of the considerations that you should keep in mind during the disassembly and
assembly of the computer.
Tools and software requirements
To service the computer, you need the following:
●
Torx T-15 screwdriver
●
Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
●
Phillips #2 screwdriver
Screws
The screws used in the computer are not interchangeable. They may have standard or metric threads and may
be of dierent lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP
strongly recommends that all screws removed during disassembly be kept with the part that was removed,
then returned to their proper locations.
CAUTION: Metric screws have a black nish. U.S. screws have a silver nish and are used on hard drives only.
CAUTION: As each subassembly is removed from the computer, it should be placed away from the work area
to prevent damage.
Cables and connectors
Most cables used throughout the unit are at, exible cables. These cables must be handled with care to
avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from
18 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the
cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts
being removed or replaced.
CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the
reassembly process. Improper cable placement can damage the computer.
Hard Drives
Handle hard drives as delicate, precision components, avoiding all physical shock and vibration. This applies
to failed drives as well as replacement spares.
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If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective packaging
and label the package “Fragile: Handle With Care.”
Do not remove hard drives from the shipping package for storage. Keep hard drives in their protective
packaging until they are actually mounted in the CPU.
Avoid dropping drives from any height onto any surface.
If you are inserting or removing a hard drive, turn o the computer. Do not remove a hard drive while the
computer is on or in standby mode.
Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid
touching the connector. For more information about preventing electrostatic damage, refer to
Electrostatic discharge information on page 14
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Do not use excessive force when inserting a drive.
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Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic elds
such as displays or speakers.
Lithium coin cell battery
The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime
of about three years.
See the appropriate removal and replacement chapter for the chassis you are working on in this guide for
instructions on the replacement procedures.
WARNING! This computer contains a lithium battery. There is a risk of re and chemical burn if the battery is
handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or re, or
expose it to temperatures higher than 140ºF (60ºC). Do not attempt to recharge the battery.
NOTE: Batteries, battery packs, and accumulators should not be disposed of together with the general
household waste. In order to forward them to recycling or proper disposal, please use the public collection
system or return them to HP, their authorized partners, or their agents.
Service considerations 19
SATA hard drive cables
SATA data cable
Always use an HP approved SATA 6.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s
drives.
Current HP desktop products ship with SATA 6.0 Gb/s hard drives.
SATA data cables are susceptible to damage if overexed. Never crease a SATA data cable and never bend it
tighter than a 30 mm (1.18 in) radius.
The SATA data cable is a thin, 7-pin cable designed to transmit data for only a single drive.
Cable management
Always follow good cable management practices when working inside the computer.
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Keep cables away from major heat sources like the heat sink.
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Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not
designed to take excessive pressure on them.
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Keep cables clear of sliding or moveable parts to prevent them from being cut or crimped when the parts
are moved.
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When folding a at ribbon cable, never fold to a sharp crease. Sharp creases may damage the wires.
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Some at ribbon cables come prefolded. Never change the folds on these cables.
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Do not bend any cable sharply. A sharp bend can break the internal wires.
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Never bend a SATA data cable tighter than a 30 mm (1.18 in) radius.
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Never crease a SATA data cable.
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Do not rely on components like the drive cage, power supply, or computer cover to push cables down
into the chassis. Always position the cables to lay properly by themselves.
20 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
4 Removal and Replacement Procedures
The following sections provide information about disassembling various components of the computer.
Preparing to disassemble the computer
To avoid injury and equipment damage, always complete the following steps in order, when opening the HP
All-in-One.
1. Remove all media from the computer.
2. Shut down the computer.
3. After the system has completely shut down, disconnect the power adapter from the back of the
computer.
4. Disconnect all other attached cables from the back of the computer.
5. Place the computer face down on a soft at surface. HP recommends that you set down a blanket, towel,
or other soft cloth to protect the screen surface from scratches or other damage.
WARNING! Beware of sharp edges inside the chassis.
Stand
Two stands are available for the computer - a xed height stand and an adjustable height stand. The removal
procedure is the same for both stands.
To remove the stand:
1. Prepare the computer for disassembly (see Preparing to disassemble the computer on page 21).
2. Press the stand release latch.
3. Rotate the stand away from the computer (1).
4. Slide the stand hooks out of the computer (2).
Preparing to disassemble the computer 21
VESA bracket
A VESA mount option is available. A separate VESA bracket and cover install in place of the stand.
To remove the VESA bracket:
1. Prepare the computer for disassembly (see Preparing to disassemble the computer on page 21).
2. Remove the VESA cover from atop the bracket.
3. Remove the two screws (1) that secure the VESA bracket to the computer.
4. Lift the bottom of the bracket, and then remove the bracket (2).
To install a VESA bracket, reverse the removal procedures.
22 Chapter 4 Removal and Replacement Procedures
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