I have a Gateway m675 laptop. When it boots up, I get an 02fa fan error, shut off computer and check fan. I installed a new fan, and get same error. I can't even bypass it. I did notice when I removed the old fan, there was a square of a dried substance, possibly thermal paste on it. The fan constantly runs when the computer is on or off. As soon as the battery is put in, they start, as soon as I plug it in, the fans start. The only way to turn them off is to disconnect the power supply and turn off. Any help would be appreciated.