First post. Bare with me.
Dug out the 2600 after all these years. Some games work and some produce nothing--the latter is for another post.
I have noticed that some of the games get the vertical sync/rolling/hold issue when turned on. Some don't.
I recently picked up "adventure" (the original cartridge and not the sears artwork) from ebay and it was rolling as well.
I'm using a Sharp 27" CRT (yeah, I still have one of those) and the old TV/Computer switch box with the screwtabs-to-RF adaptor, plugged into the RF input on the back of the TV.
I run a DVD and WiiU off this screen and nothing else has issues--so naturally I'm focusing on the 2600.
The TV has composite, component, and I believe S-video inputs as well. Perhaps a different line in would address this?
Then there is a simple question I've not found yet as I have just started browsing your archives:
Do the cartridges suffer from age? I thought that age might produce surface issues on the contacts explaining why some of mine won't even fire up.
Thanks for the patience. Look forward to hearing back.