Pull the motherboard battery for one minute with the system off. If it still won't post, then I would plan on replacing the board. Ascendtech.us has your board for $69.99. You can also go with a biostar 6150se am2+am3 board for $37.99 shipped at computer geeks. I've used this board, and it works fine, but you may have to use a different windows installation with it.