HP ProDesk 400 G4 Maintenance And Service Manual page 7

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
Using Windows tools ....................................................................................................................... 100
Restore and recovery ...................................................................................................................... 100
Backing up, restoring, and recovering in Windows 7 ........................................................................................ 103
Creating recovery media ................................................................................................................. 103
System Restore ............................................................................................................................... 106
System Recovery ............................................................................................................................. 106
Appendix A Battery replacement ................................................................................................................... 110
Creating HP Recovery media (select products only) ...................................................... 99
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
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 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
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