Inverter, blowing fuses.

So I searched here (and Google), a few things came up, but nothing I'm sure which is too relevant... And my apologies for the misplacement of this thread, if, indeed, that is the case.

I have an Energizer EN500 (pic), 12v adaptable. Worked fine for 7.5 months then killed 3 fuses in a row. I was attempting to charge my Kindle so I can read (should have stuck to paperback, don't have to charge those) and the thing crapped out. Then, unloaded (power-on, nothing drawing juice) it burnt two more.

When I tear into this thing and get at it's guts, because there's no reset option, externally, what am i looking for? External wiring is unblemished... it's either something inside the machine, or about the truck writing causing an overload.

Thanks for any info guys.

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