Chosen Solution
So my genesis 2 wont play the games. I’ve cleaned it with a credit card and cloth/alcohol and the games. All it does is flash around the screen a few times and goes black. I don’t know what’s wrong.
Check out your TV OUT Cord maybe it’s bended… Mine is.
You may have a bad video cable. Get a replacement one and try it out. If it continues to persist, there may be either a failing component on the board (maybe the VDP?), or the connector itself for the AV cable is breaking or failing.
try to get help from a retro game store like pink gorilla or even from a retro gaming enthusiast/collector
