This is the simple 2 pots/22 ohm resistor method. When first hooked up as Video Only, played Pitfall and Grand Prix with no issue as test games. Now that I've added audio and place the perfboard in the atari case (not closed up yet, I made that mistake too many times in the past!), Pitfall and Grand Prix are coming up in B&W only, no matter of the pots adjustment or the mainboard adjustment.
Other games tested include Name This Game, Mr Do, Ms Pac and Asteroids. All of those come up in color no problem. Any ideas why this only seems to be an Activision issue? I can test more games if needed....
Look forward to responses!
BTW< my setup is the Atari going thru a Radio Shack DVD recorder input to a LCD projector (sanyo z3). Again worked fine before I wired in Audio.
Murph
Update: after further testing, I'm still getting most Activision games in black & white, with the exception of Spider Fighter. Other games that check OK include Infiltrate, Sea Hunt, Winter Games, most Atari brand games, Pete Rose Baseball, pretty much anything I throw at it. Outside of Activision games, only Pac Man and Frogger seem to have the same problem in showing black and white.