7. Status lights, blinking light codes, troubleshooting lights, and POST error
messages ........................................................................................................................ 85
Status lights .................................................................................................. 85
Blinking light codes ...................................................................................... 86
POST error messages ................................................................................... 86
Resolve the issue ............................................................................................................................... 87
8. Hard reset .................................................................................................................... 87
9. Soft reset (Default Settings) ....................................................................................... 88
10. Reseat cables and connections ................................................................................ 88
11. Test with minimum conguration ............................................................................ 89
Essential hardware conguration ................................................................ 89
Safe mode ..................................................................................................... 90
12. Test with veried working conguration (hardware and/or operating system) ..... 90
13. Replace the system board ........................................................................................ 90
Verify solution ................................................................................................................................... 91
Helpful Hints ........................................................................................................................................................ 91
At startup ........................................................................................................................................... 91
During operation ............................................................................................................................... 92
Consulting with HP Service ............................................................................................................... 93
Common issues and possible solutions .............................................................................................................. 93
Power-on issues ................................................................................................................................ 93
No Power ......................................................................................................................... 93
Intermittent power-on, shutdown, reboot ..................................................................... 95
AC adapter issues ............................................................................................................ 96
Battery not recognized, not charging ............................................................................. 97
Battery discharges too fast ............................................................................................ 98
Burnt smell ...................................................................................................................... 99
POST .................................................................................................................................................. 99
No video (with power) ..................................................................................................... 99
Blinking lights ............................................................................................................... 100
Diagnostics error messages ......................................................................................... 101
BIOS password .............................................................................................................. 102
Performance (OS) ............................................................................................................................ 102
Intermittent shutdown ................................................................................................. 103
Blue screen .................................................................................................................... 104
Freeze at Windows Logo (hang/lockup) ....................................................................... 106
Electromagnetic Interference (EMI) .............................................................................. 107
No wake up .................................................................................................................... 108
Unresponsive ................................................................................................................ 109
Slow performance ......................................................................................................... 109
HP Smart Adapter warning message ........................................................................... 110
vii