At startup ............................................................................................................................................................ 45
During operation ................................................................................................................................................ 46
Consulting with HP Service .............................................................................................................................. 46
Power-on issues ................................................................................................................................................ 47
No Power ........................................................................................................................................ 47
AC adapter issue ........................................................................................................................... 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
No wake up .................................................................................................................................... 62
Unresponsive ................................................................................................................................. 63
Slow performance ........................................................................................................................ 63
Incorrect time and date ................................................................................................................ 64
Display ................................................................................................................................................................. 65
Display anomalies ......................................................................................................................... 65
Dead pixel ....................................................................................................................................... 67
No video (internal) ........................................................................................................................ 67
No video (external) ....................................................................................................................... 68
DisplayPort/VGA ............................................................................................................................ 68
HDMI ................................................................................................................................................ 68
I/O devices .......................................................................................................................................................... 70
Keyboard ........................................................................................................................................ 70
Symptom ................................................................................................................... 65
Quick check ................................................................................................................ 66
vii