HP Z240 Maintenance And Service Manual page 8

Troubleshooting scenarios and solutions ........................................................................................................... 66
Using HP PC Hardware Diagnostics (UEFI) ........................................................................................................... 73
POST error messages and diagnostic front panel LEDs and audible codes ....................................................... 74
Interpreting system validation diagnostic front panel LEDs and audible codes ................................................ 80
5 Configuring password security and resetting CMOS ........................................................................................ 82
Preparing to configure passwords ...................................................................................................................... 82
Resetting the password jumper .......................................................................................................................... 82
Clearing and resetting the BIOS ........................................................................................................................... 83
Appendix A Linux technical notes .................................................................................................................... 85
System RAM ......................................................................................................................................................... 85
Audio .................................................................................................................................................................... 85
Network cards ...................................................................................................................................................... 86
Hyper-Threading Technology .............................................................................................................................. 86
NVIDIA Graphics Workstations ............................................................................................................................. 86
AMD Graphics Workstations ................................................................................................................................ 87
Appendix B Configuring RAID devices ............................................................................................................... 88
RAID hard drive maximum and associated storage controller options .............................................................. 88
Supported RAID configurations ........................................................................................................................... 89
Configuring Intel SATA RAID ................................................................................................................................. 89
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HP Support Center .......................................................................................................... 63
HP Chat Support .............................................................................................................. 63
Customer Advisories, Customer and Security Bulletins, and Customer Notices ........... 63
Product Change Notifications ....................................................................... 64
Helpful hints ...................................................................................................................................... 64
At startup ........................................................................................................................ 64
During operation ............................................................................................................. 64
Customer Self Repair ...................................................................................................... 65
Solving minor problems .................................................................................................................... 66
Solving hard drive problems ............................................................................................................. 67
Solving display problems .................................................................................................................. 69
Solving audio problems ..................................................................................................................... 71
Solving printer problems ................................................................................................................... 72
Solving power supply problems ........................................................................................................ 72
Testing power supply ...................................................................................................... 72
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................. 74
POST numeric codes and text messages .......................................................................................... 75
Configuring system BIOS ................................................................................................................... 89