HP EliteDesk 705 G4 Maintenance And Service Manual page 7

Recovering the Configuration Settings ............................................................................................................... 77
6 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 ...................................................................................................................................... 84
Solving hard drive problems ................................................................................................................................ 85
Solving media card reader problems ................................................................................................................... 86
Solving display problems .................................................................................................................................... 88
Solving audio problems ....................................................................................................................................... 91
Solving printer problems ..................................................................................................................................... 93
Solving keyboard and mouse problems .............................................................................................................. 94
Solving hardware installation problems ............................................................................................................. 96
Solving network problems .................................................................................................................................. 97
Solving memory problems .................................................................................................................................. 99
Solving CD-ROM and DVD problems .................................................................................................................. 101
Solving USB flash drive problems ..................................................................................................................... 103
Solving front panel component problems ........................................................................................................ 104
Solving Internet access problems ..................................................................................................................... 104
Solving software problems ............................................................................................................................... 105
7 Computer Setup (BIOS), TPM, and HP Sure Start ........................................................................................... 106
Using Computer Setup ....................................................................................................................................... 106
Starting Computer Setup ................................................................................................................ 106
Navigating and selecting in Computer Setup ................................................................................. 106
Restoring factory settings in Computer Setup ............................................................................... 106
Updating the BIOS ........................................................................................................................... 107
Changing the boot order using the f9 prompt ................................................................................ 108
TPM BIOS settings (select products only) ......................................................................................................... 108
Using HP Sure Start (select products only) ....................................................................................................... 109
8 POST error messages and diagnostic front panel LEDs and audible codes ....................................................... 110
POST numeric codes and text messages .......................................................................................................... 110
Interpreting system validation diagnostic front panel LEDs and audible codes .............................................. 115
Determining the BIOS version ...................................................................................... 107
Downloading a BIOS update ......................................................................................... 107
vii