HP EliteDesk 800 65W G4 Base Model Desktop Mini PC User Manual Page 67
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If you have installed an operating system other than the factory-installed operating system, check to be
sure that it is supported on the system.
●
If the system has multiple video sources (embedded, PCI, or PCI-Express adapters) installed (embedded
video on some models only) and a single monitor, the monitor must be plugged into the monitor
connector on the source selected as the primary VGA adapter. During boot, the other monitor connectors
are disabled and if the monitor is connected into these ports, the monitor will not function. You can
select which source will be the default VGA source in Computer Setup.
CAUTION: When the computer is plugged into an AC power source, there is always voltage 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.
Solving general problems
You may be able to easily resolve the general problems described in this section. If a problem persists and you
are unable to resolve it yourself or if you feel uncomfortable about performing the operation, contact an
authorized dealer or reseller.
WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system
board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect
the power cord from the wall outlet and allow the internal system components to cool before touching.
Cannot access the Computer Setup (F10) Utility when booting the computer.
Cause Solution
The Computer Setup (F10) Utility is set to “fast boot” causing the
F10 access screen to display too briey when booting the
computer.
Before turning on the computer, press and hold F10. Turn on the
computer and continue to hold F10 until the Computer Setup
(F10) Utility is displayed.
- or –
Follow the Windows instructions for rebooting the computer into
the Computer Setup (F10) Utility.
Computer appears locked up and will not turn o when the power button is pressed.
Cause Solution
Software control of the power switch is not functional. 1. Press and hold the power button for at least four seconds
until the computer turns o.
2. Disconnect the power cord from the electrical outlet.
Computer will not respond to keyboard or mouse.
Cause Solution
Computer is in Sleep state. To resume from Sleep state, press the power button.
CAUTION: When attempting to resume from Sleep state, do not
hold down the power button for more than four seconds.
Otherwise, the computer will shut down and you will lose any
unsaved data.
System has locked up. Restart computer.
Solving general problems 59
- Maintenance and Service Guide 1
- Safety warning notice 3
- Table of contents 5
- 1 Product features 9
- Rear panel components 10
- Serial number location 10
- 2 Illustrated parts catalog 11
- Computer major components 5 13
- Miscellaneous parts 14
- Miscellaneous parts 7 15
- Generating static 16
- Grounding the work area 17
- Operating guidelines 18
- Routine care 19
- Service considerations 20
- SATA hard drives 21
- Warnings and cautions 22
- Preparation for disassembly 23
- Front bezel dust lter 23
- Access panel 24
- Front bezel 25
- Hood sensor 26
- Hard drive 28
- Hard drive connector 29
- Drive cage 30
- WLAN module 33
- Expansion connector board 37
- Memory modules 38
- Memory modules 33 41
- Heat sink 43
- Processor 45
- System board 46
- System board components 49
- Internal WLAN antenna cables 50
- Computer Setup–Main 55
- Computer Setup—Security 57
- Computer Setup—Advanced 60
- Computer Setup—UEFI Drivers 64
- Safety and comfort 65
- Helpful hints 66
- Solving general problems 67
- Solving general problems 61 69
- Solving power problems 70
- Solving hard drive problems 71
- Solving display problems 74
- Solving display problems 67 75
- Solving display problems 69 77
- Solving audio problems 78
- Solving printer problems 79
- Solving network problems 83
- Solving memory problems 85
- Solving software problems 88
- Solving software problems 81 89
- Resetting the password jumper 97
- A Power Cord Set Requirements 105
- Country-Specic Requirements 106
- Nonvolatile memory usage 109
- Questions and answers 111
- C Specications 113
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