HP Z230 Maintenance And Service Manual page 8

Troubleshooting checklist ................................................................................................................... 78
HP troubleshooting resources and tools ............................................................................................ 78
Troubleshooting scenarios and solutions ........................................................................................... 82
Using HP PC Hardware Diagnostics (UEFI) ...................................................................................... 91
Diagnostic codes and errors ............................................................................................................... 92
5 Configuring password security and resetting CMOS .................................................................................... 100
Preparing to configure passwords .................................................................................................... 100
Resetting the password jumper ........................................................................................................ 101
Clearing and resetting the CMOS .................................................................................................... 102
Appendix A Linux technical notes .................................................................................................................... 104
System RAM .................................................................................................................................... 104
Audio ................................................................................................................................................ 104
Network cards .................................................................................................................................. 105
Hyper-Threading Technology ........................................................................................................... 105
NVIDIA Graphics Workstations ........................................................................................................ 106
AMD Graphics Workstations ............................................................................................................ 107
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Online support ................................................................................................................... 78
Troubleshooting a problem ............................................................................... 79
Customer Advisories, Bulletins, Notices, and Product Change Notifications .... 79
Product Change Notifications ........................................................... 79
Helpful hints ....................................................................................................................... 80
At startup ........................................................................................................... 80
During operation ................................................................................................ 80
Customer Self-Repair program ......................................................................... 81
Solving minor problems ..................................................................................................... 82
Solving hard drive problems .............................................................................................. 83
Solving display problems ................................................................................................... 85
Solving audio problems ..................................................................................................... 87
Solving printer problems .................................................................................................... 88
Solving power supply problems ......................................................................................... 89
Testing power supply ........................................................................................ 89
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device ............................... 91
Diagnostic LED and audible (beep) codes ........................................................................ 92
LED color definitions .......................................................................................................... 95
POST error messages ....................................................................................................... 95
Using the CMOS button to reset CMOS .......................................................................... 102
Using Computer Setup (f10) Utility to reset CMOS ......................................................... 103