I've tried a lot of so-called solutions to this problem, none have worked. I have a Samsung MU6300 and no matter what, every time I turn on the TV and PS4 I will get exactly one temporary black screen somewhere between 1 and 10 minutes after power on. EVERY TIME. It only happens once, then I can play all day long without it doing it again......until I power off and power on again. Not sure what's up with that or why it does it, but I've learned to just deal with it since it only does it once.
For the record, I have tried various different HDMI cables......makes no difference to the issue.