I got a model 1 Genesis(with TMSS), and everytime i start the console the screen gets all twitchy. Check this clip, most noticeable towards the end:
When i tap the top of the console, it stops. Can someone understand what causes this? It's not the power cables, and it's not the cartridge slot.
Tapping the top works everytime, although it's pretty annoying.
I really dont want to get rid of this model, the sound is really great.