CPU fan error 90B

[crand2003]

I am getting error message  cpu fan error 90B and then the pc shuts off upon start up. 

[The_Fossette]

@crand2003,

Welcome to the HP Forums!

Thank you for posting your query on this forum, it's a great place to find answers.

Don’t worry, I assure you I will try my best to get this sorted.

In order that I may provide you with an accurate solution, I will need a few more details.

• When was the last time the computer was working fine?
• Have you made any software or hardware changes on the computer?

Meanwhile, this message indicates that the system fan is not spinning at the expected speed or a problem exists related to the heat removal system. This message occurs to help prevent costly damage to the computer.

To fix this error, use the following steps:

1. Press Enter to clear the message and allow the system to boot to the Windows Desktop.

2. Shut down the computer, and then inspect and clean the exterior vents to remove dust buildup by blowing air through the vent openings. Dust can accumulate inside the vent openings and around internal cooling components, preventing the removal of heat.

   For more information on reducing heat inside your computer, see Reducing Heat Inside the PC.

3. After you remove the dust, turn on the computer. If the error message persists, continue with these steps.

4. Perform a hard reset. Performing a hard reset can reset recorded thermal values in memory and enable you to use the computer again, even if only for a short time to access and save any important files before service.

   For more information on performing a hard reset, see Use Hard Reset to Resolve Hardware and Software Issues.

If you continue facing the issue, I recommend you update the BIOS on the computer from the below link and check whether the issue is resolved.

https://ftp.hp.com/pub/softpaq/sp85001-85500/sp85453.exe

Let me know how it goes and you have a great day!

If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!

Cheers!