Question Fan malfunctioning, any quick fix?

[Zmaxter]

View: https://youtu.be/iboTNfiyk4U

Fan on the right side of my Legion Y540 started stopping abruptly only to restart and repeat the process every couple of seconds. I couldn't capture it well in the video, it usually runs for 2-3 seconds before stopping with a "brrt" sound and it's getting extremely grating. I have removed and cleaned it thoroughly so no issue there, it looks exactly like the left fan which is working perfectly so I assume it's either:
-Short circuiting or other wiring issue I can't fix
-(hopefully) some missing driver I can download or something since my laptop wasn't touched in the few hours that it went from being absolutely fine to this, but I think there was a Windows update

In case it's the first, is there a way to disable only this fan? It's going to be a while until I can get it fixed and it's not cooling anything like this anyways.

Thank you.

 

[doolittle]

Replace both CPU and GPU fans, did the same in the summer when my son's Y520 was starting to overheat and shut down (no fan noise tho) was under $40 for both - well worth it, runs much cooler now.

Have replaced many laptop fans they tend to fail more than desktop fans due to their size, they work hard and fail hard lol

cheers!

 

[Zmaxter]

Replace both CPU and GPU fans, did the same in the summer when my son's Y520 was starting to overheat and shut down (no fan noise tho) was under $40 for both - well worth it, runs much cooler now.

Have replaced many laptop fans they tend to fail more than desktop fans due to their size, they work hard and fail hard lol

cheers!

Thanks for the reply, in the meantime I disconnected it so I don't go insane and hopefully nothing will burn in there and I'll just try to replace it ASAP. Computer hardware is usually a little overpriced here in Portugal and even 40 is a little out of reach but I'll see what can be done.

 

[Paperdoc]

Here's my suspicion - not a "for sure" thing. The fan giving you trouble is somewhat old and its bearings are wearing out. The automatic fan speed system has a setting for the minimum speed it will try to do, and that probably is done by the minimum Voltage supplied to the fans. The wear of bearings on ONE of your fans has got to the point that, at that reduced voltage, it stalls because of high bearing friction. Now, MANY auto fan controls have a process to check for a stalled fan and re-start it by giving it a Voltage boost. Once it is running again, the control system returns to "normal" and reduces the Voltage, but that causes it to stall again. Repeat....

So, two solutions: Long term, replace the fans - they are wearing out. Short term: look in BIOS Setup for an option to set a new (higher) minimum speed in the fan control system so it does not stall even with the worn bearings.