HP ZBook 15u G5 Maintenance And Service Manual page 9

Analyze the issue ............................................................................................................................... 90
5. Remove or uninstall recently added hardware, software .......................................... 90
6. HP Hardware Diagnostics and Tools ........................................................................... 91
7. Status lights, blinking light codes, troubleshooting lights, and POST error
messages ........................................................................................................................ 95
Resolve the issue ............................................................................................................................... 98
8. Hard reset .................................................................................................................... 98
9. Soft reset (Default Settings) ....................................................................................... 99
10. Reseat cables and connections ................................................................................ 99
11. Test with minimum configuration .......................................................................... 100
12. Test with verified working configuration (hardware and/or operating system) ... 101
13. Replace the system board ...................................................................................... 101
Verify solution ................................................................................................................................. 102
Helpful Hints ...................................................................................................................................................... 102
At startup ........................................................................................................................................ 103
During operation ............................................................................................................................. 103
Consulting with HP Service ............................................................................................................. 104
Common issues and possible solutions ............................................................................................................ 104
Power-on issues .............................................................................................................................. 104
No Power ....................................................................................................................... 104
Intermittent power-on, shutdown, reboot ................................................................... 106
AC adapter issue ........................................................................................................... 108
Battery not recognized, not charging ........................................................................... 108
Battery discharges too fast .......................................................................................... 110
Burnt smell .................................................................................................................... 111
POST ................................................................................................................................................ 111
No video (with power) ................................................................................................... 111
Manually updating BIOS and drivers ............................................................ 90
Remotely deploying BIOS and drivers .......................................................... 90
HP PC Hardware Diagnostics (UEFI) ............................................................. 91
HP Support Assistant (HPSA) ....................................................................... 93
HP BIOS Configuration Utility (BCU) ............................................................. 94
HP Image Diagnostic Tool ............................................................................. 94
HP Thermal Monitor ..................................................................................... 94
Non HP diagnostics tools ............................................................................. 94
Status lights .................................................................................................. 95
Blinking light codes ...................................................................................... 96
POST error messages ................................................................................... 96
Power Good (Troubleshooting) lights .......................................................... 97
Essential hardware configuration .............................................................. 100
Safe mode ................................................................................................... 101
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