ASUS board, 1 year old, has the Asus Probe Utility for, among other things, monitoring the fans, incl. the PS fan, the CPU fan, and one of my 3 case fans. All of a sudden, it says that the chassis (case) fan isn't running, and is giving an audible "bonk" warning sound. But the fan IS running. It's plugged in to the board. What's wrong, can anything be done to fix this? Thanks! I hate to turn the utility off, but don't want to listen to that bonking all the time, incl in the headphones.