I have a Sega Game Gear that the picture is faded (good at wierd angle) but good sound. I know it can be fixed but where do I send it to get fixed? It was my son's & I want to get it fixed for his children to use!
More than likely it needs recapping (capacitors changed). You don't mention what country you're in - this is an International forum, so I can't really advise you on where to send it. There are several of us here that repair them, though.
It would be prohibitively expensive shipping to and from the UK, so I can't really help. You're best off asking in the repair forum.