I replaced all the caps and added the resistor on the one board and still have the jail bars. And the picture looks way better on the LCD TV than on the CRT TV. Pitfall is horrible on the CRT but playable on the LCD. Donkey Kong is more or less fine on either but probably because of the black background.
I'm going to do the composite upgrade maybe this weekend and eliminate the RF altogether. Hopefully that will do the trick.
I've been having this issue and have yet to find a solution. Mojoatomic is sending me a cap replacement kit so I'll still go through with it but it looks like that won't solve the problem. The only other thing I can think to try is to purchase a power conditioner. It could be a form of "dirty power" that causes the jailbars but that was suggested to me as a possibility.
Also its possible that doing the composite mod won't eliminate the jailbars but actually make them more prominent.
I had a whole thread on this issue and the best guess is that is just the way these 40 year old machines may behave. No concrete solutions were ever found as far as I know.
Edited by AtariLeaf, Fri Feb 24, 2017 10:06 PM.