Noise problem: Left fan replaced, problem persists
I was having big noise problems coming from the left side of my Macbook Pro. Grinding stuff, highly uncomfortable. First I opened the laptop and added some lube to the left fan. The noise disappeared for a couple of hours. I then proceeded to replace the fan, with one from ebay, following the instructions from this website.
After doing so, the left (new) fan continue to produce some noise, although a slightly different one than the one before. Noise goes crazy and suddenly stops. Now iStat says that the left fan ain't spinning. I did a reset on the SMC but still, left fan runs at 0 RPM. Noise of course, disappeared. :P
PS. I'm not sure if the fan is effectively not spinning, I believe I'm getting a low humming, though a different one that the one coming from the right side.
The problem with buying a used fan or an ebay fan is that it's probably as old as the one you're replacing. On this part I much prefer new parts. Here are new ones: MacBook Pro 15" (Model A1150) Left Fan
Replaces a defective or noisy fan — 50 available at 29.95 each.