So this issue needs more awareness as it's currently getting buried in the PS4 Pro OT. It's a pretty huge issue considering this "4k" console has a serious bug with multiple major 4k tvs making it basically unusable unless you do the fix below. I had this when booting for the first time with my B6 OLED LG TV. Black screen on boot, with audio that keeps breaking up every few seconds.
Current solution is to turn off your console. Then hold the power button until it beeps twice and goes into safe mode.
Change the resolution to 1080p. (I believe you may be able to disable hdcp/choose hdcp 1.4 at this stage also which should fix it)
Then the console will boot.
If you disable HDCP (or apparently choose hdcp 1.4) you'll then be able to select 4k without it being a black screen.
Only problem is I believe by disabling hdcp we can't use 4K Netflix etc. Credit for the fix goes to someone over at /r/PS4Pro.
Edit - Vizio users try this:
Current solution is to turn off your console. Then hold the power button until it beeps twice and goes into safe mode.
Change the resolution to 1080p. (I believe you may be able to disable hdcp/choose hdcp 1.4 at this stage also which should fix it)
Then the console will boot.
If you disable HDCP (or apparently choose hdcp 1.4) you'll then be able to select 4k without it being a black screen.
Only problem is I believe by disabling hdcp we can't use 4K Netflix etc. Credit for the fix goes to someone over at /r/PS4Pro.
Edit - Vizio users try this:
Finally got it to work. Here's what I did, and it was...weird. Hopefully I can help someone with this, pretty sure this is close to exactly what I did
Set to 1080P while plugged HDMI into port that worked (30hz 4k port that only accepted 1080p signal)
While in 1080 I turned off HDR, HDCP, and Deep color
Booted to safe mode with PS4 plugged into same port
Set HDCP to automatic (was originally 1.4)
PS4 restarted
Plugged into 4k 60hz game slot
Blank screen
Restarted into safe mode again
Went to set resolution
PS4 restarted
PS4 checked system storage and rebooted
Blank screen
Restarted into safe mode again
Went to change resolution
PS4 did not check system storage and let me choose resolution
Chose 2160p yuv420
Worked fine.
Sometimes I really love technology....
Biggest takeaway is to just keep retrying it with settings that might get it to work for ya. Again my tv was a VIZO M-50 C1