System Fan (90b) error message on HP laptop bootup g7-1033

October 8, 2014 at 02:49:32
Specs: Windows 7

I am getting the error message 90B on my Pavilion G7-1033sg.
The Fan is running and the Bios is up to date but I am still getting the error message at startup.

I have checked the temp with "core temp" The highest temperature is 41 degree C.
GPU does not have a sensor so I dont know that temp.

what could be the problem? What can I do to fix it?

See More: System Fan (90b) error message on HP laptop bootup g7-1033

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October 8, 2014 at 06:05:24
Test your fan using Speed Fan utility. You can download it from

After downloading and installing that, reboot your PC and run that program. Click on the "Readings" tab and increase the speed of your PC's fan to 100 percent. If you can hear your fan increasing in speed, your fan is working just fine. Just ignore that error in BIOS. Your laptop at that moment was probably overheating.

Follow instructions here to fix the cooling system off your laptop.

If you are still not able to fix it, go to a technician.

Hope this helps!

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October 8, 2014 at 21:47:29
Oh, I see you did repost. Here's the previous thread with its suggestions:

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October 9, 2014 at 05:55:51
Thanks earlpg !!

I have tried that Speed Fan Tool.
It says:
Fan 1 = 0RPM
Fan 2 = 0RPM
Fan 3 = 0RPM
GPU Fan = 0RPM

GPU temp = 43 degree C
Core = 42 degree C

If I change the procentage no different. I guess the Fan is running on full power all the time. But why and how can I fix it?

I have checked for dust but thats all clean.

It looks like the speed sensor of the fan is damage or not pluggedin anymore.

What do you think?

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Related Solutions

October 12, 2014 at 05:20:21
What do you mean earlpg??
What could that mean?

Can I use the Notebook or is somethings wrong?

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November 21, 2014 at 09:45:59
Ok. same issue. 90b error
My fan replaced. Brand new. Runs super!
did hard shut down.
did Bios uprade
have an external fan cooling system
tech that replaced fan says all is fine except the damn 90b error!!
SO does anyone ACTUALLY know how to fix this because not even hp manufactutrer seems to know ow to fix it. And yes even BIOS settings are set to always on in an attempt to trick the problem away. and the problem with error still being there is pc may or maynot randomly shut down for no reason bringing a whole new set of problems.

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November 21, 2014 at 19:53:04
Can you disable the fan warning in bios setup? If so that would be easier than trying to fix whatever the problem is.

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November 21, 2014 at 20:25:33
If speedfan is reading zero on all fan speeds and the fan is running, then the sensor in the fan is bad or one of the wires is pinched, shorted, or disconnected. Carefully examine the fan cable and its connectors as well as the solder joints on the motherboard related to the fan jack there. If you can find a problem, the solution would become more obvious then.

You have to be a little bit crazy to keep you from going insane.

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