I received some real classic Parker Brothers cartridges(Qbert, Frogger, Tutankham, Super Cobra, Star Wars, Reactor etc.) for my Atari 2600 from Canada.
When I turn the machine on with these tapes there is the pic and the sound and the game is playable, but the whole screen is vibrating and I can't see too much from the game.
I also have a second Reactor cartridge (bought in Hungary), it works fine.
Is it a Pal-NTSC problem or any other ideas?
Thanks in advance for any suggestions!