HP ProDesk 400 G5 SFF

7 POST error messages and diagnostic front panel LEDs and audible codes ................................................................................. 89
POST numeric codes and text messages ........................................................................................................................... 89
Interpreting system validation diagnostic front panel LEDs and audible codes .......................................................... 94
8 Password security and resetting CMOS .............................................................................................................................................. 96
Resetting CMOS and/or the password jumper .................................................................................................................. 97
Changing a Setup or Power-on password ......................................................................................................................... 99
Deleting a Setup or Power-on password ........................................................................................................................... 99
9 Using HP PC Hardware Diagnostics (UEFI) ....................................................................................................................................... 100
Downloading HP PC Hardware Diagnostics (UEFI)to a USB device .............................................................................. 101
10 Backing up, restoring, and recovering ............................................................................................................................................ 102
Backing up information and creating recovery media ................................................................................................... 102
Using Windows tools ...................................................................................................................................... 102
Using the HP Cloud Recovery Download Tool to create recovery media (select products only) ........ 102
Restoring and recovery ....................................................................................................................................................... 103
Restoring, resetting, and refreshing using Windows tools ...................................................................... 103
Recovering using HP Recovery media ......................................................................................................... 103
Changing the computer boot order ............................................................................................................. 103
Using HP Sure Recover (select products only) ........................................................................................... 104
Appendix A Battery replacement .......................................................................................................................................................... 105
Appendix B Statement of memory volatility ....................................................................................................................................... 108
Current BIOS steps ............................................................................................................................................................... 108
Nonvolatile memory usage ................................................................................................................................................ 110
Questions and answers ...................................................................................................................................................... 112
Using HP Sure Start ............................................................................................................................................................. 113
Appendix C Power cord set requirements ........................................................................................................................................... 114
General requirements ......................................................................................................................................................... 114
Japanese power cord requirements ................................................................................................................................. 114
Country-specic requirements .......................................................................................................................................... 115
Appendix D Specications ...................................................................................................................................................................... 116
Index ........................................................................................................................................................................................................... 117
v