
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
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