Just sharing so if others have an old Remote with screen issues (and it's out of warranty), this might be helpful. Pretty sure mine had taken a hard knock at some point, so user error for sure.
This is not a tutorial or suggested fix in any way. Don't pull your stuff apart unless you are willing to abandon it and put it in a dumpster.
After a lot of use (300+ shows, several hundred rehearsals) my Remotes screen developed some issues. Lines appeared on the screen and it was very faded. Messing with the "Contrast" knob on the back of the Remote would erratically (and only temporarily) adjust the image. The knob also felt a bit loose and wobbly, so it was an obvious fix. Its a board mounted 10K Linear pot, so I replaced it with a chassis mount pot of same value. The original actually fell apart when removed the board, so I think it might have taken a substantial hit at some point. Anyway.. Here are some pics of my DIY repair.
Works like a charm now...
(hope the pics are in order!)