CPU fan error 90B Temp Issue

[gtstone]

I - like a lot of other HP owners- started getting this issue- after the CPU fan was speeding up then slowing down- I replaced the fan - cleaned all of the dust off- etc- still the same problem.

I have never had a computer problem like this- and may never bu another HP as a result- but for now- any suggestions on how to fix it would be great.

It's got a little age on it- but it has hardly any usage.

Thank You

[Gaya1239]

Hi @ gtstone,

Welcome to the HP Support Community

I understand you are facing an issue with your HP Pavilion Desktop - 570-P033w. Not to worry I will help you to get a resolution to resolve the issue.

Please try the following Troubleshoots steps. 

1.    Turn off the Unit.

2.    Disconnect the AC adapter.

3.    Remove any discs from the disc drive.

4.    Remove memory cards from the card reader slot.

5.    Disconnect all nonessential peripheral devices, such as printers, scanners, external hard drives, and USB flash drives.

6.    Disconnect the AC adapter press and hold the power button for approximately 15 seconds.

7.    Reconnect the AC adapter, and then turn on the computer.

Step 2

Turn off the unit and please press and hold the Windows key + letter B key and the power button together for 30 seconds after 30 seconds, 1st release the power button but keep holding the Windows key and B key for ten more seconds and then release these two keys If done correctly, you will see the display flashing once. Please attempt it thrice as this step and Restart the unit

Step3

The unit has to be turned off, Press Win+ V while holding these two keys then Press the Power button, continue to hold all three keys for 30 seconds and then release the Power button first and then release these two keys Please attempt it thrice  and then you may get a Pop-Up CMOS Check and it will restart the unit 

Even if you don't get a Pop-up restart the unit manually after 3 attempts.

Please run the hardware test Please follow the link  (Run HP PC Hardware Diagnostics UEFI tests)

If the Test passed then please proceed with the troubleshooting steps below

If the Test fails then pls provide the failure ID 

Please refer to this Document: the troubleshooting steps -  System Fan (90b) error message on startup

Also, try updating the computer:

Step 1 Windows Updates - 

1) In the search box, type, and open Windows Updates. 

2) Check for updates. 

3) If the updates are available, click on Install and restart the computer. 

Step 2 HP Support Assistant Updates:

1) In the search box, type, and open HP Support Assistant. 

2) Check for updates. 

3) If the updates are available, click on Install and restart the computer. 

It seems like you're experiencing an issue with your HP Pavilion Desktop where you're encountering a CPU fan error (error 90B) due to temperature issues. 

Here are some steps you can take to troubleshoot and potentially resolve the problem:

Check the CPU Fan Connection: Ensure that the CPU fan is properly connected to the motherboard. Sometimes, loose connections can cause the fan to malfunction or not work optimally.

Update BIOS: Sometimes, updating the BIOS (Basic Input/Output System) can help resolve temperature-related issues. Visit HP's official website, find your desktop model, and look for BIOS updates available for download.

Monitor CPU Temperature: Install software to monitor your CPU temperature. Programs like Core Temp or HWMonitor can help you keep track of your CPU temperature in real-time. This will give you an idea of whether the temperature is actually rising to problematic levels.

Check Thermal Paste Application: If the CPU has been removed or if you've replaced the CPU fan, make sure that the thermal paste between the CPU and the heatsink is applied properly. Improper application of thermal paste can lead to poor heat dissipation, causing temperature issues.

Inspect Airflow: Ensure that the airflow within the case is not obstructed. Make sure that all vents are clear of dust and debris and that there is adequate airflow around the CPU and other components.

Consider CPU Cooler Replacement: If the CPU cooler is not functioning correctly despite being replaced, you might want to consider replacing it with a better aftermarket cooler. There are various CPU coolers available that offer better performance and heat dissipation compared to stock coolers.

I hope this helps! Keep me posted. 

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