HP ProDesk 400 G2.5 Maintenance And Service Manual page 7

6 Troubleshooting without diagnostics ............................................................................................................ 63
Safety and comfort .............................................................................................................................................. 63
Before you call for technical support .................................................................................................................. 63
Helpful hints ........................................................................................................................................................ 64
Solving general problems ................................................................................................................................... 65
Solving power problems ...................................................................................................................................... 69
Solving hard drive problems ............................................................................................................................... 70
Solving media card reader problems .................................................................................................................. 72
Solving display problems .................................................................................................................................... 73
Solving audio problems ....................................................................................................................................... 77
Solving printer problems ..................................................................................................................................... 79
Solving keyboard and mouse problems ............................................................................................................. 80
Solving Hardware Installation Problems ............................................................................................................ 82
Solving Network Problems .................................................................................................................................. 84
Solving memory problems .................................................................................................................................. 88
Solving processor problems ................................................................................................................................ 89
Solving CD-ROM and DVD problems .................................................................................................................... 90
Solving USB flash drive problems ....................................................................................................................... 92
Solving front panel component problems .......................................................................................................... 92
Solving Internet access problems ....................................................................................................................... 93
Solving software problems ................................................................................................................................. 94
7 POST error messages ................................................................................................................................... 96
POST numeric codes and text messages ............................................................................................................ 96
Interpreting POST diagnostic front panel LEDs and audible codes .................................................................. 102
8 Password security and resetting CMOS ........................................................................................................ 106
Resetting the password jumper ........................................................................................................................ 106
Clearing and resetting the CMOS ....................................................................................................................... 107
9 HP PC Hardware Diagnostics ....................................................................................................................... 109
Why run HP PC Hardware Diagnostics .............................................................................................................. 109
How to access and run HP PC Hardware Diagnostics ....................................................................................... 109
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 109
10 System backup and recovery .................................................................................................................... 111
Backing up, restoring, and recovering in Windows 8.1 or Windows 8 ............................................................. 111
Creating recovery media and backups ........................................................................................... 111
Restoring and recovering using Windows tools ............................................................................. 111
Using Reset when the system is not responding ......................................................... 112
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