Not surprised at answers. Fixable but at what price? It is not the price of the parts but the labour of the tech. Still have it & will remove cover to see if there is anything very obvious or to reset.
There is some life. It can be turned on but the overload light is on. No 120VAC though.
Bought a new one, 1000W pure SW, & wired it idiot proof. Needs to be plugged into the ATS & there are very specific instructions on circuits that need to be OFF at the breaker panel first. The only circuits left live are the two for the outlets. TVs & phone chargers don't need much.