Well I took the back panel off of my Double Dragon today to see if I could fix my problem. (Knowing next to nothing about the hobby didn't really help in my thinking I could do so).
I checked all the wire connections and they seem firm. I solved my color issue with the pot dials on the back of the monitor. Well, I got them as close to good as they will be. Further inspection shows what appears to be Mouse Trap burn. Could this contribute to a less than stellar display?) So the yellow tinge is gone, and I'm not longer vertically scrolling.
The game, however, keeps resetting at random. The farthest I can make it before a restart is after I start whooping up on the second street thug. The soonest it happens is during the ROM/RAM tests (which are all OK). Also there is a muffled/clicky sound that is present when there shouldn't be sound at all. It sort of flickers when the game restarts repeatedly at times. When the music and sound fx are present it is there but unnoticeable. My punch out has the same muffle sound but works perfectly otherwise, so this may not be an issue. Thanks in advance for any guidance.