I've got a Shadow that has an issue with the DMD. Every time the knocker fires, the DMD starts glitching out. I can still see what it's trying to display, but there are is a lot of flickering of the image. I don't think it's the DMD itself as it seems to display fine otherwise. The glitching will also slowly start happening if the machine has been on awhile. If I shut off the machine and turn it back on, everything seems fine. Is this a ground issue? It doesn't seem to be related to the ribbon cable as unplugging/replugging doesn't seem to help, although I'm sure it's possible. Thanks for any advice you can provide.