after a quick search I couldnt find any info on how to enter service menu on the acer.
I really wish I could turn off the power led and disable the greeting Acer logo when you turn on the monitor.
You could do it on the Benq (disable greeting logo) 144hz monitors..
as far as dead pixels, I think Ive discovered 1 dead subpixel here. Its really barely noticeable and actually looks like a dust corn or smth like that.
I think the only time the pixels are really annoying is when they glow in 1 color all the time and are basically stuck pixels. Other than that, if they just are "dark", I seriously doubt anyone ever notices them unless you sit like 15 cm in front of the display.
Esp on high dpi monitors its really hard to see the dead pixels.