Ok, found an Atari in a used store.
Bought it for $5 because the guy said it was not working.
Came home, plugged it in and yes.. it was working o/
But the rest switch wasn't. Bought another one, soldered it, everything went ok for almost a week!
Well, 2 days I left him plugged to the wall but turned off.
The font is dead now so I tried with an universal one, 9V set with - to +.
It power ups for a second. It even shows the image in the tv for a second, them he behaves like the other one. Game is in there and just a black screen.
I think it's some electrical damage. So is there any resistor I can change ?