Inverter getting power, not powering anything.

Have a bit of a puzzle. This is my 2nd inverter (AIMS 2500 watt) that I've had for about 6 months. It was working just fine until about a week ago then nothing. It's getting power...meter is showing 14.2 volts going in, but 0.00 coming out. It just stopped. The other inverter (a 1500 watt Cobra) did the same thing. A 3rd....another 1500 Cobra works, but sounds like the ventilation fan threw a bearing or something because it's LOUD. Strange because up until now the AIMS was working fine...powered any and everything I needed; and nice and quiet to boot. I've heard possible blown fuse (which I had to open up the unit to check...there were 8 of them all intact). Customer support from AIMS is a little iffy, sent an e-mail to tech support & then called to get authorization to return for repair.....still waiting on responses. So if I do have to tinker with it myself, anyone have a theory?

 

The mechanics in the shop did the wire up job for the truck (it IS theirs...). Not sure of the exact gage, but it's the heavier duty.As far as I kn0w, I'm the only one this has happened to. ...Maybe I'm just cursed.