System Fan (90B) What I must do to resolv this problem

[Maestro14]

System Fan (90B)  What I must do to resolv this problem

[Jerry_57]

Hi @Maestro14,

Welcome to the HP Support Community.

Thank you for posting your query. I will be glad to help you.

To help resolve System Fan Error (90B) on an HP notebook/workstation, HP recommends these steps:
 

1. Update BIOS and drivers or reset BIOS to default settings. BIOS updates can improve fan behavior and thermal control. https://support.hp.com/in-en.
    
2. Perform a hard reset. This can reset recorded thermal values in memory.
    
3. Check for airflow blockage:
   
   
   • Make sure vents and fan areas are free of dust or obstructions.
      
   • Make sure the notebook is not on a hot surface or blocking air intake.
      
4. Run HP PC Hardware Diagnostics (UEFI) to test the fan and confirm it spins correctly and is not making abnormal noise.
    
5. If accessible, reseat the fan cable. HP also notes that reseating the fan cable can help fix POST error 90B.
    
6. If the fan still fails, the system fan may need replacement.
    

Hard reset steps:

1. Turn off the computer.
    
2. Remove it from any dock/port replicator.
    
3. Disconnect all external devices.
    
4. Unplug the AC adapter.
    
5. Disconnect the battery (if possible).
    
6. Press and hold the power button for at least 15 seconds.
    
7. Reconnect the battery and AC adapter.
    
8. Turn the computer back on.

I hope this will help.
 

Take care and have a good day.