I was under the impression that rgb can be converted to component video fairly easily.  Lots of people have done this mod, gathering from google results.  I do know that the rf out repair is not that easy because I was going to do it myself until I discovered that the motherboard in the tg is completely encased in metal underneath the plastic housing, and it is soldered together.  So I don't think you want to go that route, unless you're a lot handier than I am with that stuff.  The cd-rom attatchment is an easy solution tho, if you have the dough.  Plus you have the added benefit of playing cd games.  Anyway, I was just passing along some info, it's just another option.