The load was likely too large and blew the fuse. Unplug and remove the back of the unit. Find the little peice that looks like a little white bullet. That is the fuse. About $30. Your local parts store should have it in stock. Or there is a parts link below if you want to order on line.
Click here for parts
Where is this fuse? I have taken the back of the top off and the back off of the unit itself. I don't see anyhting that looks like a fuse.
It looks like a little white bullet.