ITS PROBABLY THE INTERNAL FUSE IN THE MAIN CIRCUIT BOARD.
THIS FUSE IS NOT REPLACIBLE UNLESS YOU KNOW HOW TO REPAIR THESE CIRCUIT BOARDS.
THERE COULD BE A NUMBER OF REASONS WHY THIS FUSE WOULD BLOW.
IN ANY CASE THE CIRCUIT BOARD IS MOST LIKELY TO HAVE OTHER DAMAGED COMPONENTS.
AJ, April 2005