After upgrading to the MK2 of the Maschine controller about 2 years ago I soon ran into the issue of one of the displays flickering and ultimately ending up much dimmer than the other.
At that time I didn’t think too much about it but sent it back to the store for a replacement right away.
A couple of weeks ago I noticed that my replacement controller also started acting bad. The same problems with the display was happening on this unit.
Since I bought it in another country I figured I was out of luck and would have to simply use it with one display darker than the other.
Then something interesting happened. As I was drumming out a pattern and I hit the pad in the upper right, the display suddenly came back to full brightness.
Now whenever it drops in brightness I just tap the upper row of the pads a couple of times and it comes back up again. Probably there’s a loose connection in there somewhere so I’m going to open it up someday and poke around when I have the time.