Early games had one type of print and later had another as well (one was decals, one was screen print...I 'think' early were decals from what I can tell from mine). Don't quote me on this though.
So, a few nights ago on mine, the top display went out. Both screens had been garbled the last time I played it and it seemed like a lose cable at the time as a quick shake fixed it. Since only the top went out and it didn't fade, I don't think it's gassed out. I swapped the cable out, did some rudimentary troubleshooting and didn't find anything that made it work.
I haven't dug out the schematics yet, but I see there are 2 caps on the display board, my assumption is that one goes to each display? Trying to fix it might have to wait as I'm in the middle of a remodel and I don't feel like it right now lol. I thought about just getting an LED screen, but I am concerned that the issue isn't the screen but something further back.