I've been having trouble with my DH DMD and have exhausted all my options.
The photos show a couple examples of the issue.
Random rows on the DMD light up and images are often garbled or refreshing slowly.
The DMD also hums quite loudly, especially when I screen test the rows. Columns don't hum.
The backbox includes brand new boards for MPU, Power Driver, and DMD Controller and all have been tested to be working.
I've swapped all serial cables and the DMD with my Judge Dredd, and everything works fine over there.
The game "thumps" pretty hard when I turn it on and it kind of lets out a short buzzing "whine" when I turn it off. The game plays as normal. The issue only shows up on the DMD. And the loud sounds when turned on and off.
Beyond my very limited troubleshooting capabilities at this point. I've had a couple technical friends chip in, but they're stumped too. A grounding issues was suggested, but don't know where to go with it.
Any help, advice, ideas would be greatly appreciated.