Game Gear Sound and Video Fixes
I've never owned a Game Gear, and often thought about picking one up so that I could have a go at fixing the common faults. The main one being the sound problems, the secondary is screen issues.
I recently ordered a replacement screen panel for my Game Boy Color, and noticed that the same website sells kits, with instructions to repair the Game Gear and a whole heap of other stuff. The chap running it has been nice in a few emails we've had back and forth.
Anyway, have a look yourself at Rewind-Bits