Low humming sound coming from near the right fan. What to replace?
My wife's MacBook Pro was dropped a while back. Ever since it has made a low humming sound that drives me crazy. It seems to be coming from the right fan and indeed sounds like a rotating noise.
The heat sink was damaged in the fall, and I have already replaced that. I was hoping that would fix the noise, but it did not.
While replacing the heat sink, I also removed the right fan, inspected it for damage, and cleaned it thoroughly. I did not see any damage.
I need help diagnosing the problem so that I know what part needs replaced. I can easily replace the fan, but I am afraid this is not the problem, since I cannot find any damage to the fan.
Any help would be greatly appreciated.