Thank you very much for the information. Hopefully I can figure it out then. Are the chips the kind that have off-the-shelf replacements? I'm assuming not.

Hello. I pulled my 1902A out of storage in hopes of using its composite input with my old NES (my CRT sucks with 240p composite) and found a thin, bright, horizontal line in the middle of the screen. Looking it up, I learned that this is called 'vertical collapse'. There was also a crack in the plas...