Dont quote me on this but I would say that the system would be worth fixing if you did it yourself or had someone do it for you. You can have S-Video or Direct RCA jacks modded onto the system if you would like. It could simply just be a loose connection or something of the such and could be easily fixed with a little solder.
I have start messing with system repairs/mods and would be willing to take a look at it for you or if you wanted to go to someone else with a more known reputation then thats ok aswell. Otherwise if your going to donate it then I would be willing to take it off your hands.
override