I am having this same issue. Everything seems to work because I can still turn on/off mardi gras in setup. Just can't see anything. Definitely not a power issue, I have tried removing all other plugs to the controller, and even tried it on my laptop (that I had used it on, with no problems, for months) and still no luck. I also noticed it was not actually connecting to Studio One like it used to. I couldn't do the shortcuts even without the screen. Before someone says it yes the light was blue. Weird issue.. I have a ticket open with Presonus