No video, audio works, half FPS

Hey all.

I’ve recently bought a N64.

One day it works, the next doesn’t.

Tried every cable with a different console, so i don’t think they’re the problem.

When i turn it on, video doesn’t work but audio does… half speed (for example. when i boot sm64, on the start screen i hear “iii’tsss aaaa mmmmeeee…..mmmmaaarrriioo… i get it, fps wasn’t good back then, but we’re talking about.. 10 fps or something like that)

Dismantled it, tried cleaning everything. Still does’t work.

Either the console OR, i thought, the Jumper Pak (i cleaned it too, still didn’t solve).

Any idea? Thanks