My plastic latch area was worn only about a 1/32 " but that was enough to cause the blown fuses. There were 3 switches and the middle one which crowbars the power and blows the fuses, ends up closing first due to the worn out plastic. I bent and glued a very thin piece of metal ( from an old floppy disk slide cover - PERFECT thickness) over the worn plastic area about 6 months ago I believe...so far still working fine...thanks to all who brought this to my attention, I thought the fuse flowing was a bad diode or capacitor.