You know it's bad when I end up here asking for help.
My Genesis model 2 has seemed to have called it quits.
It shows the TMSS screen, but then that's it. It goes black and nothing. Tried all sorts of cartridges, even 32X fails.
Oddly though, Sega CD works fine.
And yes, I tried cleaning the connectors, they are clean as a brand new whistle.