It's the internal fuse (5kv 0.8A). Just above the transformer to the microwave source. It's in a black plastic case. You can get a replacement from ebay for about £2.
Anthony, September 2010
Assuming all the control are still working (it looks like it should be working) but it just doesn't heat up the food - then it sounds like the internal fuse has blown.
ebgebe, May 2009
I assume you mean CONTROLS power up (?) but obviously it is not. NOTHING from the outside that you can do here. Sorry.
