I just booted up my HyperPixel for the first time last night, and to my dismay as well, I am seeing those ‘rounded corner’ dead pixels. My package had the ‘fragile’ note inside, and I was sure to be careful, as before even opening it, I was aware of the fragility of the screen, however after installing it very carefully, as soon as the backlight first activated, I knew something wasn’t right:
I thought at first that I had maybe depressed the screen too hard when installing, though I only touched the black PCB, and these rounded corners are even on the opposite end of the display. I will open a ticket for sure, as I was excited to actually use this display (BTW, from the areas that are working, it’s absolutely gorgeous!), but it sure looks like this is a manufacturing problem as many of us are seeing this rounded corner pattern.