I hooked up an atari 2600 to a tv using the female rca to coax adapter. The system is on and turned the screen black. When I put in a game nothing changes when I hit the game reset toggle it makes the screen flicker but no game. I have tried 15 different games with the same result. Any ideas?? I have not cleaned up the system yet and am hoping that is all the problem is but I fear something else is wrong.