B286HK black screen/flicker
My monitor is about 2 years old and has always done this (support told me sometimes it works so I'm SOL with them), but with varying likelihood. It could work the first time, or I could try 30 times till it works. When I press the power button one of the following 3 scenarios will happen. If it goes to sleep that will also roll the die again.
1) The monitor is black (but a different black than when it's off, so it's displaying this black)
2) The monitor will go from black to the desktop. Usually it will only stay on the desktop for <1 second, but sometimes it stays longer up to ~8 seconds. If it stays longer I'll get periodic horizontal static lines.
3) The monitor works fine.
There is only 1 driver version for this monitor, and I am fully updated on windows (I'm guessing it may not play well with some which is why the rate has varied over time). I am using the display port to support 4k. At one point I found a workaround, where if I turned on the monitor, and then waited until the energy saver icon appeared and did its first move to turn on my PC, then it would work every time. Unfortunately after 3 months or so that no longer worked.