I have a Gateway LX 6810 Desktop that the motherboard went down on. I called Gateway and got a new motherboard (not nearly that easy but...) and installed it. I got the new thermal paste (artic silver) and applied it correctly. And I am pretty all wires and everything was installed back to normal.
However, now my cpu fan is constantly running on high (not super high though). I have reinstalled windows, updated bios, and have done everything i can of to get it back to normal.
Yet, the fan is always running on high. It turns on about 20 secs after I hit the power button, and never turns off.