How to fix fan error

"Had same error earlier,

No need to take laptop apart .

Simply blow air from you're mouth into the left side where the fan exhaust is.

Could hear the fan moving and dust came out of laptop.

Just blow very hard into it, worked for me."

Mena Adel, sounds like a bad fan. If your computer is a T-410, I recommend you get the service manual from here. Page 119 will show you how to replace the fan.

"I'm have worked on this particular laptop plenty of times. The bottom line, Lenovo T-410 Has a poor engineering design. The fan blades are very small unlike 99% of any other laptop brand which causes the fan to stop working once the blades are full of debris. There's no need to replace the fan. All you have to do to fix this issue is to get a can of compressed air and blow up the air ventilation outlet. That takes care of the problem 99% of the times.

Ricardo"

"Short answer:

If you just finished upgrading to Windows 10 and started getting the error, get into the BIOS (F1 key after powering up) and reset to default. Be sure to have ""OS optimized defaults"" set to Disabled, unless you do use UEFI-based Secure Boot in the system. If you're unsure, try both types of defaults.

Thanks Bander for the tip in your comment.

Backstory:

I had this error come up right after I finished upgrading Windows 7 to Windows 10. It happened after the whole upgrade and all the update installations were done completely. Satisfied with my upgrade experience, I shut down my B490 laptop and went to take a nap. I came back from nap and turned it on for a normal day's work, only to get two beeps and the Fan error message.

The fan was working completely fine, and it didn't seem like anything would be wrong with the fan hardware per se. The laptop had not moved a hair from where it was, so I doubted the fan's pin connection getting lose. I tried blowing air into the holes. Some dust came out, but it didn't help.

What did help was to reset the BIOS to default. You have to be careful here, to NOT choose the OS optimized default (unless you are really using UEFI secure boot). I didn't realize and I applied OS optimized default first. No real harm though, the computer just showed boot menu and the hard disk wouldn't boot. After running some simple diagnostic goodies I found in that menu, I went back to the BIOS and restored the default again, but this time NOT the OS optimized defaults. Couple of restarts, and we're back in business.

So if you are here because you just upgraded to Windows 10 and installed all the updates, and are suddenly getting fan error, just reset the BIOS to defaults as above. It would seem that some changes the Windows 10 upgrade or any of the updates makes would have screwed up some BIOS compatibility and caused the current BIOS settings to cough up the misleading error."

i found it not useful to blow on the fan. it gets spit in the fan blades. just go to the store and buy a can of air. its super cheap and super effective. just open it up and blow it into the side of your computer. a huge puff of dust came out of mine and it started up. super easy and effective.

"Remove the battery and plug in the power adapter.

Turn on the computer and you will get the same error.. no problem.

The computer shuts down by itself

put back in the battery and turn on the computer.

The boot sequence will run through the normal boot process.

This is a temporary fix. you may actually need to clean or replace the fan."