I was wiping the blue/plastick with a dry kleenex. the back vent that the fan got wiped and the fans exterior was wiped on the a board as well as the top of it. I have not opened the casing to anything(even the stickers are still there). I had the power off but nothing unplugged,would that do it? I PRAY TO THOR ALMIGHTY that it's the B board that is cheaper to replace. If it's the A board, there goes my first real arcade setup, and maybe my last. I'm freaking out a bit since I've this for two weeks, I started to enjoy it, and now all might be lost.