isn't that a LED display? or mayeb a VFD?
Opps. Yup. It's not LCD. It's a mulit-segment display ala VFD or LED.
anyways, looks like whatever multiplexer is being used to cycle through the digits is acting up.
That's what I was originally thinking, but see how the edges of the display blocks fade? That's weird. With a misbehaving multiplexer I'd expect characters sent to the display to continue to display as it cycled through the positions across the screen -- not fade away like that.
I'm wondering if there's something wrong with the power to the display. Filter cap gone bad maybe.
Good news is Rocktron tech support is very responsive. They can't seem to view that video, but they're asking all the right questions and seem to want to help even though the unit is used.
I opened it up last night and the display is on its own board, but unfortunately the ribbon cables joining it to the main board aren't socketed. Oh well. Hopefully a fix won't involve removing the main board because that looks like a beastly job. It's basically held in and suspended by all the switches. Lots and lots of things to undo!