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My fans have been acting really weird since i got my computer back from repair. Randomly, the fans will change pitch every few seconds, the sound of which is extremely annoying. But sometimes the fans will be normal and go off and on every few minutes. Removed the keyboard and looked at the fans to see if i could notice anything. Sometimes the main fan doesnt turn, and just kind of shudders as if its trying to spin. I tried giving it a boost but it just stops and keeps shuddering. When the main fan does this, the other fans change pitch. Anyone have this problem? Anyone have any ideas about what i can do about it. Also, the FN+F10 thing has never affected my fans so i cant play around with that.