I have two Genesis systems that both power on but have different results.
Both are 1601 models, but they have different boards. I believe the first is the original Genesis pre-license screen. There are no wires attached to this board on the inside. The second has wires soldered to the board.

The first one powers but does nothing. The second powers up, will start a game and then freezes about 5 seconds in. I have done all the common sense stuff such as cleaning the contacts on system and game and trying different wires.

Is there a definitive hardware site for the Genesis that I could look at pictures of the boards, etc?

Anyone know how to repair these systems?