When I was in high school in Baton Rouge..... (What? Hang on, stick with me)..... there was this guy named Bobby Lesh who could fix anything electronic. Kid was a wiz. So, one day, out of the blue, Alice Cooper comes blasting out over the loudspeaker across the campus - "School's Out for Summer, School's Out for EVER!"
Someone had obviously found a way to hack into the intercom system. After the song there was silence.... for about four seconds, then the principal came on and in this very calm voice he said, "Bobby Lesh, please report to the office." Everyone, including the principal, knew right away.
You need a Bobby Lesh
If they do have to replace that display, I hope you'll hang on to it. We have a few Bobby Leshes here (not me). It'd be good to know what went wrong and to have a used part you could sell to whoever this might happen to next. Maybe that next bad part can be fixed and passed on, as well.
Just a thought, Doc.....