Resources .......................................................................................................................................................................................................................................94
General troubleshooting steps........................................................................................................................................................................................95
Identify the issue.............................................................................................................................................................................................................95
1. Understand the issue...................................................................................................................................................................................96
Boot-up sequence ...................................................................................................................................................................................96
Failure classification..............................................................................................................................................................................96
2. Examine the environment.........................................................................................................................................................................98
3. Perform a visual inspection of hardware......................................................................................................................................98
4. Update BIOS and drivers..........................................................................................................................................................................99
Manually updating BIOS and drivers .........................................................................................................................................99
Remotely deploying the BIOS and drivers .............................................................................................................................99
Analyze the issue............................................................................................................................................................................................................99
5. Remove or uninstall recently added hardware, software .................................................................................................99
6. HP Hardware Diagnostics and Tools................................................................................................................................................99
HP PC Hardware Diagnostics (UEFI).........................................................................................................................................100
HP BIOS Configuration Utility (BCU)..........................................................................................................................................101
HP Image Diagnostic Tool ................................................................................................................................................................ 102
HP Thermal Monitor.............................................................................................................................................................................. 102
Non HP diagnostics tools ................................................................................................................................................................. 102
7. Status lights, blinking light codes, troubleshooting lights, and POST error messages ............................. 102
Status lights ...............................................................................................................................................................................................102
Blinking light codes...............................................................................................................................................................................103
POST error messages........................................................................................................................................................................104
Resolve the issue..........................................................................................................................................................................................................105
8. Hard reset..........................................................................................................................................................................................................105
9. Soft reset (Default Settings).................................................................................................................................................................106
10. Reseat cables and connections .....................................................................................................................................................106
11. Test with minimum configuration......................................................................................................................................................107
Essential hardware configuration...............................................................................................................................................107
Safe mode ...................................................................................................................................................................................................108
12. Test with verified working configuration (hardware or operating system).......................................................108
13. Replace the system board...................................................................................................................................................................108
Verify solution..................................................................................................................................................................................................................109
Helpful Hints .................................................................................................................................................................................................................................110
At startup.............................................................................................................................................................................................................................110
During operation ............................................................................................................................................................................................................110
Consulting with HP Service..................................................................................................................................................................................... 111
Common issues and possible solutions...................................................................................................................................................................111
Power-on issues...............................................................................................................................................................................................................111
No power................................................................................................................................................................................................................... 112
Intermittent power-on, shutdown, reboot.......................................................................................................................................... 114
AC adapter issue................................................................................................................................................................................................ 115
Battery not recognized, not charging.................................................................................................................................................. 115
Battery discharges too fast........................................................................................................................................................................118
Burnt smell ..............................................................................................................................................................................................................118
POST .......................................................................................................................................................................................................................................119
No video (with power) ......................................................................................................................................................................................119
Blinking lights........................................................................................................................................................................................................120
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