HP ZBook Studio G 315-ap000 - 15ap099, Maintenance And Service Manual, Page: 9 / 185

Non HP diagnostics tools ............................................................................. 70
7. Status lights, blinking light codes, troubleshooting lights, and POST error
messages ........................................................................................................................ 71
Status lights .................................................................................................. 71
Blinking light codes ...................................................................................... 72
POST error messages ................................................................................... 72
Power Good (Troubleshooting) lights .......................................................... 73
Resolve the issue ............................................................................................................................... 74
8. Hard reset .................................................................................................................... 74
9. Soft reset (Default Settings) ....................................................................................... 75
10. Reseat cables and connections ................................................................................ 75
11. Test with minimum configuration ............................................................................ 76
Essential hardware configuration ................................................................ 76
Safe mode ..................................................................................................... 77
12. Test with verified working configuration (hardware and/or operating system) ..... 77
13. Replace the system board ........................................................................................ 77
Verify solution ................................................................................................................................... 78
Helpful Hints ........................................................................................................................................................ 78
At startup ........................................................................................................................................... 78
During operation ............................................................................................................................... 79
Consulting with HP Service ............................................................................................................... 79
Common issues and possible solutions .............................................................................................................. 80
Power-on issues ................................................................................................................................ 80
No Power ......................................................................................................................... 80
Intermittent power-on, shutdown, reboot ..................................................................... 82
AC adapter issue .............................................................................................................. 83
Battery not recognized, not charging ............................................................................. 83
Battery discharges too fast ............................................................................................ 85
Burnt smell ...................................................................................................................... 86
POST .................................................................................................................................................. 86
No video (with power) ..................................................................................................... 86
Blinking lights ................................................................................................................. 87
Diagnostics error messages ........................................................................................... 88
BIOS password ................................................................................................................ 89
Performance (OS) .............................................................................................................................. 89
Intermittent shutdown ................................................................................................... 90
Blue screen ...................................................................................................................... 91
Freeze at Windows Logo (hang/lockup) ......................................................................... 93
Electromagnetic Interference (EMI) ................................................................................ 94
No wake up ...................................................................................................................... 95
Unresponsive .................................................................................................................. 96
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