Thanks, BFL. I talked to the mfg and was told there had been a catastrophic failure in the inverter. So I will just replace it. Fuse is good. It will power up but now only produces about 5-9v then shuts down. Wait a few min and it will power up again. it is toast and for the price I am going to replace it. Not expensive enough to mess with it any longer. I have other things to do.