Use a philips screwdriver to remove the four screws in the b ottom, Separate and look next to the power transformer. MAKE SURE YOU HAVE THE UNIT5 UNPLUGGED FROM THE WALL SOCKET. Remove the fuse with a screwdriver or knofe or whatever and have the fuse checked. If blown, buy a new one and replace it. Should be OK after putting all back together.
Tim
Tim, April 2010