My display has gone bad, the view angle is terribly uneven: https://goo.gl/photos/VBkYJrS4pQbwgjpE6
The color or contrast of the pixels has also shifted from the middle outwards making even head on viewing uncomfortable: https://goo.gl/photos/gVr7jwa8DndsN3kKA
I’ve tried all the tricks in this thread, using the test mode and leaving it on overnight as well. My guess is it’s something faulty with the electro-chemical part of the display and I’ve got no warranty. Trying to research what was going wrong, I came across the strategy of displaying random values, like noise, on misbehaving displays to encourage the pixels to go back to a more neutral/even response state internally. No idea if it would work for this kind of LCD.
Now I’m waiting to hear back from the repair folks about doing something to fix or replace it. I wish these machines had higher quality displays to start with or I could just swap in one from the Analog Heat or Machine Drum MKII