HP EliteDesk 800 G4 Manual

Maintenance and Service Guide
HP EliteDesk 800 G4 SFF 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.
First Edition: May 2018
Document Part Number: L17285-001
Product notice
This guide describes features that are common
to most models. Some features may not be
available on your product. To access the latest
user guide, go to http://www.hp.com/support,
and follow the instructions to nd your
product. Then select User Guides.
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.

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 airow. 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 dened by the International Standard for Safety of Information Technology
Equipment (IEC 60950-1).
iii

iv Safety warning notice

Table of contents
1 Product features ........................................................................................................................................... 1
Standard conguration features ........................................................................................................................... 1
Front panel components ........................................................................................................................................ 2
Rear panel components ......................................................................................................................................... 3
Serial number location .......................................................................................................................................... 3
2 Illustrated parts catalog ................................................................................................................................ 4
Computer major components ................................................................................................................................ 4
Miscellaneous parts ............................................................................................................................................... 7
3 Routine care, SATA drive guidelines, and disassembly preparation .................................................................... 9
Electrostatic discharge information ...................................................................................................................... 9
Generating static ................................................................................................................................. 9
Preventing electrostatic damage to equipment ............................................................................... 10
Personal grounding methods and equipment .................................................................................. 10
Grounding the work area ................................................................................................................... 10
Recommended materials and equipment ........................................................................................ 11
Operating guidelines ........................................................................................................................................... 11
Routine care ......................................................................................................................................................... 12
General cleaning safety precautions ................................................................................................ 12
Cleaning the computer case .............................................................................................................. 12
Cleaning the keyboard ....................................................................................................................... 12
Cleaning the monitor ......................................................................................................................... 13
Cleaning the mouse ........................................................................................................................... 13
Service considerations ......................................................................................................................................... 13
Power supply fan ............................................................................................................................... 13
Tools and software requirements ..................................................................................................... 13
Screws ............................................................................................................................................... 13
Cables and connectors ...................................................................................................................... 14
Hard Drives ........................................................................................................................................ 14
Lithium coin cell battery .................................................................................................................... 14
SATA hard drives .................................................................................................................................................. 15
SATA data cable .................................................................................................................................................... 15
SMART ATA drives ................................................................................................................................................ 15
Cable management .............................................................................................................................................. 16
v

4 Removal and replacement procedures ........................................................................................................... 17
Preparation for disassembly ............................................................................................................................... 17
Access panel ......................................................................................................................................................... 18
Front bezel ........................................................................................................................................................... 19
Slim optical drive bezel blank .............................................................................................................................. 20
Front bezel dust lter .......................................................................................................................................... 21
System board connections .................................................................................................................................. 22
Memory ................................................................................................................................................................ 23
Populating DIMM sockets .................................................................................................................. 23
Removing and installing DIMMs ........................................................................................................ 24
Expansion card ..................................................................................................................................................... 26
Drives ................................................................................................................................................................... 30
Drive positions ................................................................................................................................... 30
Removing and installing drives ......................................................................................................... 30
Removing a 9.5 mm slim optical drive ........................................................................... 31
Installing a 9.5 mm slim optical drive ............................................................................ 33
Removing a 3.5-inch hard drive ...................................................................................... 34
Installing a 3.5-inch hard drive ....................................................................................... 36
Drive cage ........................................................................................................................ 40
Removing a 2.5-inch hard drive ...................................................................................... 41
Installing a 2.5-inch hard drive ....................................................................................... 42
Removing and installing an M.2 SSD storage card ......................................................... 44
WLAN module ...................................................................................................................................................... 46
Hood lock ............................................................................................................................................................. 47
Card reader ........................................................................................................................................................... 48
Antennas .............................................................................................................................................................. 49
Air duct ................................................................................................................................................................. 51
Option board ........................................................................................................................................................ 52
Optional rear port ................................................................................................................................................ 53
Fan sink ................................................................................................................................................................ 54
Fan ........................................................................................................................................................................ 57
Processor ............................................................................................................................................................. 58
Power supply ....................................................................................................................................................... 59
Speaker ................................................................................................................................................................ 60
System board ....................................................................................................................................................... 61
System board callouts ....................................................................................................................... 64
Changing from desktop to tower orientation ..................................................................................................... 65
5 Computer Setup (F10) Utility ........................................................................................................................ 66
Computer Setup (F10) Utilities ............................................................................................................................ 66
Using Computer Setup (F10) Utilities ................................................................................................ 66
vi

Computer Setup–Main ....................................................................................................................... 68
Computer Setup—Security ............................................................................................................... 70
Computer Setup—Advanced ............................................................................................................. 73
Computer Setup—UEFI Drivers ......................................................................................................... 78
Recovering the Conguration Settings ............................................................................................................... 78
6 Troubleshooting without diagnostics ............................................................................................................ 79
Safety and comfort .............................................................................................................................................. 79
Before you call for technical support .................................................................................................................. 79
Helpful hints ........................................................................................................................................................ 80
Solving general problems .................................................................................................................................... 81
Solving power problems ...................................................................................................................................... 85
Solving hard drive problems ................................................................................................................................ 86
Solving media card reader problems ................................................................................................................... 88
Solving display problems .................................................................................................................................... 89
Solving audio problems ....................................................................................................................................... 93
Solving printer problems ..................................................................................................................................... 95
Solving keyboard and mouse problems .............................................................................................................. 96
Solving hardware installation problems ............................................................................................................. 97
Solving network problems .................................................................................................................................. 98
Solving memory problems ................................................................................................................................ 101
Solving CD-ROM and DVD problems .................................................................................................................. 102
Solving USB ash drive problems ..................................................................................................................... 104
Solving front panel component problems ........................................................................................................ 105
Solving Internet access problems ..................................................................................................................... 105
Solving software problems ............................................................................................................................... 106
7 POST error messages and diagnostic front panel LEDs and audible codes ....................................................... 107
POST numeric codes and text messages .......................................................................................................... 107
Interpreting system validation diagnostic front panel LEDs and audible codes .............................................. 112
8 Password security and resetting CMOS ........................................................................................................ 114
Resetting the password jumper ........................................................................................................................ 114
Clearing and resetting the BIOS ........................................................................................................................ 116
9 Using HP PC Hardware Diagnostics .............................................................................................................. 117
Using HP PC Hardware Diagnostics Windows ................................................................................................... 117
Downloading HP PC Hardware Diagnostics Windows ..................................................................... 117
Downloading the latest HP PC Hardware Diagnostics Windows version ..................... 118
vii

Downloading HP Hardware Diagnostics Windows by product name or number
(select products only) ................................................................................................... 118
Installing HP PC Hardware Diagnostics Windows ........................................................................... 118
Using HP PC Hardware Diagnostics UEFI ........................................................................................................... 118
Starting HP PC Hardware Diagnostics UEFI .................................................................................... 119
Downloading HP PC Hardware Diagnostics UEFI to a USB ash drive ............................................ 119
Downloading the latest HP PC Hardware Diagnostics UEFI version ............................ 119
Downloading HP PC Hardware Diagnostics UEFI by product name or number
(select products only) ................................................................................................... 119
Using Remote HP PC Hardware Diagnostics UEFI settings (select products only) ........................................... 120
Downloading Remote HP PC Hardware Diagnostics UEFI ............................................................... 120
Downloading the latest Remote HP PC Hardware Diagnostics UEFI version ............... 120
Downloading Remote HP PC Hardware Diagnostics UEFI by product name or
number .......................................................................................................................... 120
Customizing Remote HP PC Hardware Diagnostics UEFI settings .................................................. 120
Appendix A Battery replacement ................................................................................................................... 122
Appendix B Power cord set requirements ....................................................................................................... 125
General Requirements ....................................................................................................................................... 125
Japanese Power Cord Requirements ................................................................................................................. 125
Country-Specic Requirements ........................................................................................................................ 126
Appendix C Statement of memory volatility ................................................................................................... 127
Nonvolatile memory usage ............................................................................................................................... 129
Questions and answers ..................................................................................................................................... 131
Using HP Sure Start (select models only) .......................................................................................................... 132
Appendix D Specications ............................................................................................................................. 133
Index ........................................................................................................................................................... 134
viii

1 Product features
Standard conguration features
Features may vary depending on the model. For support assistance and to learn more about the hardware
and software installed on your computer model, run the HP Support Assistant utility.
NOTE: This computer model can be used in a tower orientation or a desktop orientation.
Standard conguration features 1

Front panel components
Drive conguration may vary by model. Some models have a bezel blank covering the slim optical drive bay.
Front panel components
1 Slim optical drive (optional) 6 USB 2.0 port (fast charging port)
2 SD card reader (optional) 7 Audio-out (headphone) jack
3 USB Type-C port (10 Gbit/s data speed) 8 Audio-out (headphone)/Audio-in (microphone) combo
jack
4 USB 3.1 Gen2 ports (2) (10 Gbit/s data speed) 9 Hard drive activity light
5 USB 2.0 port 10 Power button
NOTE: The combo jack supports headphones, line output devices, microphones, line input devices, or CTIA style headsets.
NOTE: The light on the power button is normally white when the power is on. If it is ashing red, there is a problem with
the computer and it is displaying a diagnostic code. Refer to Interpreting system validation diagnostic front panel LEDs and
audible codes on page 112 to interpret the code.
2 Chapter 1 Product features