At startup ............................................................................................................................................................ 45
During operation ................................................................................................................................................ 46
Consulting with HP Service .............................................................................................................................. 46
Common issues and possible solutions ............................................................................................................................. 47
Power-on issues ................................................................................................................................................ 47
No Power ........................................................................................................................................ 47
Intermittent power-on, shutdown, reboot ............................................................................... 49
AC adapter issue ........................................................................................................................... 50
Battery not recognized, not charging ........................................................................................ 50
Battery discharges too fast ......................................................................................................... 52
Burnt smell .................................................................................................................................... 53
POST .................................................................................................................................................................... 53
No video (with power) .................................................................................................................. 53
Blinking lights ................................................................................................................................ 54
Diagnostics error messages ........................................................................................................ 55
BIOS password .............................................................................................................................. 56
Performance (OS) .............................................................................................................................................. 56
Intermittent shutdown ................................................................................................................. 57
Blue screen .................................................................................................................................... 58
Freeze at Windows Logo (hang/lockup) .................................................................................... 60
Electromagnetic Interference (EMI) ........................................................................................... 61
No wake up .................................................................................................................................... 62
Unresponsive ................................................................................................................................. 63
Slow performance ........................................................................................................................ 63
HP Smart Adapter warning message ........................................................................................ 64
Incorrect time and date ................................................................................................................ 64
Display ................................................................................................................................................................. 65
Display anomalies ......................................................................................................................... 65
Symptom ................................................................................................................... 65
Quick check ................................................................................................................ 66
HP PC Hardware Diagnostics (UEFI) for video test .............................................. 66
Display assembly diagram ...................................................................................... 67
Dead pixel ....................................................................................................................................... 67
No video (internal) ........................................................................................................................ 67
No video (external) ....................................................................................................................... 68
DisplayPort/VGA ............................................................................................................................ 68
HDMI ................................................................................................................................................ 68
No or bad external video via docking ........................................................................................ 69
Incorrect or missing color/distorted image .............................................................................. 69
I/O devices .......................................................................................................................................................... 70
Keyboard ........................................................................................................................................ 70
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