I have a Yamaha PSR-E303, and all of a sudden one day when I play a note it comes out warped and transposed several octaves down. The speakers are full of static as well. Unplugging the thing for a while and letting it be fixes the problem, but only for a few seconds, before the sound becomes warped all over again.
This has happened before, but after I let it be for a month, it started to behave correctly again. I suppose the problem returned when I absent-mindedly placed a laptop on top of the thing one day. So to all the electronics-savvy guys in this forum: Is my keyboard doomed?