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Just had the black screen with white (active) BenQ power button issue again, then a reboot ~30 secs or so later, after clicking to change Chrome 64-bit tabs.
I bought a better DP cable from Amazon at the start of the year, after reading in here that the supplied DP is ancient spec.
Recently when this issue started, I even tried swapping DP ports on the back of my 390, no change.
Having rebooted, I've turned off hardware acceleration in Chrome 64-bit settings. Has this fixed things for others?
I have Sapphire Trixx running at Windows startup, to force a fan speed of 75% currently. Could this be conflicting with AMD drivers and causing the black screen issue above?
What drivers are you on? I upgraded to 16.8.3 yesterday and haven't had a black screen since then.