11. Test with minimum conguration ....................................................................................... 59
Essential hardware conguration .......................................................................... 59
Safe mode ................................................................................................................. 60
12. Test with veried working conguration (hardware and/or operating system) .......... 60
13. Replace the system board .................................................................................................... 60
Verify solution .................................................................................................................................................... 61
Helpful Hints ........................................................................................................................................................................... 61
At startup ............................................................................................................................................................ 61
During operation ................................................................................................................................................ 62
Consulting with HP Service .............................................................................................................................. 62
Common issues and possible solutions ............................................................................................................................. 63
Power-on issues ................................................................................................................................................ 63
No Power ........................................................................................................................................ 63
Intermittent power-on, shutdown, reboot ............................................................................... 65
AC adapter issue ........................................................................................................................... 66
Battery not recognized, not charging ........................................................................................ 66
Battery discharges too fast ......................................................................................................... 68
Burnt smell .................................................................................................................................... 68
POST .................................................................................................................................................................... 69
No video (with power) .................................................................................................................. 69
Blinking lights ................................................................................................................................ 70
Diagnostics error messages ........................................................................................................ 70
BIOS password .............................................................................................................................. 72
Performance (OS) .............................................................................................................................................. 72
Intermittent shutdown ................................................................................................................. 73
Blue screen .................................................................................................................................... 74
Freeze at Windows Logo (hang/lockup) .................................................................................... 76
Electromagnetic Interference (EMI) ........................................................................................... 77
No wake up .................................................................................................................................... 78
Unresponsive ................................................................................................................................. 79
Slow performance ........................................................................................................................ 79
HP Smart Adapter warning message ........................................................................................ 80
Incorrect time and date ................................................................................................................ 80
Display ................................................................................................................................................................. 81
Display anomalies ......................................................................................................................... 81
Symptom ................................................................................................................... 81
Quick check ................................................................................................................ 82
HP PC Hardware Diagnostics (UEFI) for video test .............................................. 82
Display assembly diagram ...................................................................................... 83
Dead pixel ....................................................................................................................................... 83
No video (internal) ........................................................................................................................ 83
ix