As someone with a monitor that's prone to blacking out like this (not due to Lunar) and was at one point convinced that the monitor got bricked: the key is waiting ~5 minutes before plugging the power back in. A quick unplug-plug in a hurry might not do it. You need to wait for the internal capacitors to discharge to the point where the controller gets properly reset.
There's a whole area of electronics design related to this (unfortunately).
That's also the point of the LEDs you see on power bricks. After unplugging, the LED uses up the capacitor current to discharge them faster and also serves as a visual indicator to know when it's safe to plug back the cable.
Only unplugging everything seemed to work.
Happened maybe 5 times in the many years ive owned it
On this monitor I can just unplug and plug the monitor back in and it immediately works again, but its an annoying enough issue and it happens frequently enough that I just stopped using DDC control for it altogether.