HP ProDesk 400 G4 Small Form Factor (SFF) - Maintenance and Service Guide

Solving software problems .................................................................................................................................. 85
7 POST error messages and diagnostic front panel LEDs and audible codes ......................................................... 86
POST numeric codes and text messages ............................................................................................................. 86
Interpreting system validation diagnostic front panel LEDs and audible codes ................................................ 91
8 Password security and resetting CMOS .......................................................................................................... 93
Resetting CMOS and/or the password jumper .................................................................................................... 94
Changing a Setup or Power-on password ........................................................................................................... 95
Deleting a Setup or Power-on password ............................................................................................................. 96
9 Using HP PC Hardware Diagnostics (UEFI) ....................................................................................................... 97
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................... 97
10 System backup and recovery ...................................................................................................................... 99
Backing up, restoring, and recovering in Windows 10 ........................................................................................ 99
Creating recovery media and backups .............................................................................................. 99
Creating HP Recovery media (select products only) ...................................................... 99
Using Windows tools ....................................................................................................................... 100
Restore and recovery ...................................................................................................................... 100
Recovering using HP Recovery Manager ...................................................................... 101
What you need to know before you get started ........................................ 101
Using the HP Recovery partition (select products only) ............................ 102
Using HP Recovery media to recover ......................................................... 102
Changing the computer boot order ............................................................ 102
Removing the HP Recovery partition (select products only) ..................... 102
Backing up, restoring, and recovering in Windows 7 ........................................................................................ 103
Creating recovery media ................................................................................................................. 103
Creating recovery media using HP Recovery Manager (select models only) ............... 104
Creating recovery discs with HP Recovery Disc Creator (select models only) ............. 105
Creating recovery discs .............................................................................. 105
Backing up your information ........................................................................................ 105
System Restore ............................................................................................................................... 106
System Recovery ............................................................................................................................. 106
System Recovery when Windows is responding .......................................................... 107
System Recovery when Windows is not responding .................................................... 107
System Recovery using recovery media (select models only) ..................................... 108
Using HP Recovery Disc operating system discs (select models only) ........................ 108
Appendix A Battery replacement ................................................................................................................... 110
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