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- HP Community
- Notebooks
- Notebook Hardware and Upgrade Questions
- New fan 90b error

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12-12-2020 10:42 PM
Getting the 90b error almost every start up. Replaced the fan a couple years ago and shortly after I started having the problem but I wasn't using it much so I lived with it. Now I'm using it more and want to resolve the issue. Only ordered the fan and not the heat sink since all I removed was the fan. And I'm not sure if I can update the bios since I'm running windows 10 and there isn't an option for that os on hp website.
Side note: during the installation of the fan I noticed the fan blade assembly isn't directly mounted to the rotor so if I tug at it, it'll come off. Doesn't stop the operation of the fan though.
12-24-2020 10:32 AM
I reviewed your post and I understand that you are getting a system fan 90B error on the computer.
Don’t worry, I assure you I will try my best to get this sorted.
What is the product number of your computer?
Meanwhile, I recommend you follow the steps in the below article and check if it helps.
https://support.hp.com/in-en/document/c04935023
Let me know how it goes and you have a great day!
P.S: Welcome to the HP Support Community 😊
If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!
Cheers!
Stay Home – Stay Safe
The_Fossette
I am an HP Employee
12-29-2020 07:10 PM
Product number is LW178UA#ABA
Completed all the steps except for getting a new fan and replacing the thermal paste. Wanted to see if there was anything I could do before having to install another new fan to avoid the problem happening again.
12-30-2020 12:19 PM
If the steps I shared didn't do the trick, it would confirm a hardware issue and I recommend you contact support and check the available service options for your computer.
Here is how you can get in touch with support.
1)Click on this link – www.hp.com/contacthp/
2)Select the product type.
3)Enter the serial number of your device or select let HP detect your product option.
4)Select the country from the drop-down.
5)You should see the HP phone support number or Chat option listed.
Cheers!
The_Fossette
I am an HP Employee