HP ZBook 15u Maintenance And Service Manual page 9

2. Examine the environment .......................................................................................... 82
3. Perform a visual inspection of hardware ................................................................... 83
4. Update BIOS and drivers ............................................................................................. 83
Analyze the issue ............................................................................................................................... 83
5. Remove or uninstall recently added hardware, software .......................................... 83
6. HP Hardware Diagnostics and Tools ........................................................................... 84
7. Status lights, blinking light codes, troubleshooting lights, and POST error
messages ........................................................................................................................ 87
Resolve the issue ............................................................................................................................... 89
8. Hard reset .................................................................................................................... 89
9. Soft reset (Default Settings) ....................................................................................... 90
10. Reseat cables and connections ................................................................................ 90
11. Test with minimum configuration ............................................................................ 91
12. Test with verified working configuration (hardware and/or operating system) ..... 92
13. Replace the system board ........................................................................................ 92
Verify solution ................................................................................................................................... 93
Helpful Hints ........................................................................................................................................................ 93
At startup ........................................................................................................................................... 94
During operation ............................................................................................................................... 94
Consulting with HP Service ............................................................................................................... 95
Common issues and possible solutions .............................................................................................................. 95
Power-on issues ................................................................................................................................ 95
No Power ......................................................................................................................... 95
Intermittent power-on, shutdown, reboot ..................................................................... 97
AC adapter issue .............................................................................................................. 98
Battery not recognized, not charging ............................................................................. 99
Battery discharges too fast .......................................................................................... 100
Burnt smell .................................................................................................................... 101
POST ................................................................................................................................................ 101
Manually updating BIOS and drivers ............................................................ 83
Remotely deploying BIOS and drivers .......................................................... 83
HP PC Hardware Diagnostics (UEFI) ............................................................. 84
HP BIOS Configuration Utility (BCU) ............................................................. 86
HP Image Diagnostic Tool ............................................................................. 86
HP Thermal Monitor ..................................................................................... 86
Non HP diagnostics tools ............................................................................. 86
Status lights .................................................................................................. 87
Blinking light codes ...................................................................................... 88
POST error messages ................................................................................... 88
Essential hardware configuration ................................................................ 91
Safe mode ..................................................................................................... 92
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