I tried to play my Coleco Telstar Alpha and it doesn't work!!!!

the sounds still come from the system but nothing shows up on the tv..

somebody help me...is it something i'm doing wrong? is there a cable that can be fixed/replace?

thanks

oh i forgot this one..
is there a contact i can clean?
i found tons of information on how to fix an NES but virtually none for a telstar

I consider myself a Coleco Telstar Alpha expert

in that I at least know what a Telstar Alpha is

other then that umm, try cleaning everything and look for online guides

Hmm well if cleaning all your contacts and ensuring your RF box works (switch it to game and try an atari or NES) doesnt work then idk what to tell you. Schematics would be nearly impossible to come by unless Coleco released them years ago (doubtful) and even then you would need to have an electronics degree to understand them (RF circuits aren't the easiest btw). Also many of the components used may be obsolete except maybe some 741 opamps and 555 timers (so popular they are still in use today).