WOW!It is apparent that Marty's suffer from bad capacitors like the Duo's

.....
After a couple hours of play time this morning, I decided to take the Marty apart and remove the disk drive to try and see about what size the drive belt is. Easy enough. The disk drive unit is all one piece.....

I took it out and unpluged the ribbon cable connected to it, put the console back together (which so far only involved 5 screw).
I plugged the Marty back up and turned it on to see if it would function properly without the drive. All hell broke loose at this point. The audio was all f*cked up. Loud pops, static, noise, even when there was supposed to be no audio. I figured it was because of the disk drive being removed, so I re-installed it. No fix. Still really bad sound problems.
The only game system I've ever had sound issues with is a Gamegear. It acted similarly to this, and was fixed by replacing some audio caps.
Well I have no online resources for help fixing this (like we have here for TG/PC Engine problems) so I jumped in. I took it completely apart down to the pcb. I looked around for any obviously leaky caps and found one lone cap sitting by itself....leaking. I removed it and cleaned the pcb underneath it, which had quite a bit of the leaked fluid on it. I put the system back together without the the cap, to see if the cap itself was audio related. The sound worked perfectly without it. So I am under the assumption that maybe the problem was the fluid making contact on the board beneath it, there were other traces running below the cap in fact. So I replaced the cap with a very close rated one (470uf 10v to-a 470uf 16v) and put it back together again. All's well so far. I threw this in while I was there.....

That led was green
