Helpful Hints ......................................................................................................................................................................... 121
At startup .......................................................................................................................................................... 121
During operation ............................................................................................................................................. 121
Consulting with HP Service ............................................................................................................................ 122
Common issues and possible solutions ........................................................................................................................... 123
Power-on issues .............................................................................................................................................. 124
No power ..................................................................................................................................... 124
Intermittent power-on, shutdown, reboot ............................................................................. 126
AC adapter issue ......................................................................................................................... 127
Battery not recognized, not charging ..................................................................................... 128
Battery discharges too fast ....................................................................................................... 130
Burnt smell .................................................................................................................................. 130
POST .................................................................................................................................................................. 132
No video (with power) ................................................................................................................ 132
Blinking lights .............................................................................................................................. 133
Diagnostic error messages ....................................................................................................... 133
BIOS password ............................................................................................................................ 134
Performance (OS) ............................................................................................................................................ 135
Intermittent shutdown .............................................................................................................. 135
Blue screen .................................................................................................................................. 136
Freeze at Windows Logo (hang or lockup) ............................................................................. 136
Electromagnetic Interference (EMI) ......................................................................................... 137
No wake up .................................................................................................................................. 138
Unresponsive .............................................................................................................................. 139
Slow performance ...................................................................................................................... 140
HP Smart Adapter warning message ...................................................................................... 140
Incorrect time and date ............................................................................................................. 141
Display .............................................................................................................................................................. 142
Display anomalies ...................................................................................................................... 143
Symptom ................................................................................................................. 143
Quick check ............................................................................................................. 144
HP PC Hardware Diagnostics (UEFI) for video test ........................................... 144
Display assembly diagram ................................................................................... 144
Dead pixel .................................................................................................................................... 145
No video (internal) ...................................................................................................................... 145
No video (external) ..................................................................................................................... 145
DisplayPort/VGA ......................................................................................................................... 146
HDMI ............................................................................................................................................. 146
No or bad external video via docking ...................................................................................... 147
Incorrect or missing color/distorted image ............................................................................ 147
Touch screen ............................................................................................................................... 148
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