Windows 10: Monitor Flickers Black for 5 seconds

HelloI've had some issues with my monitor as it will flicker black for roughly 5 seconds. The PC stays on fine and everything is controllable but the monitor will go black. The monitor does stay on though and indicates it is on. I got this pc in December as a Christmas gift and it was a prebuilt from Am

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Random black screen flickering issue

Win10 Enterprise version 1909 build 18363.720

So I've been trying to troubleshoot an incredibly annoying screen flickering issue for months now.

I have a dual monitor setup, one is an Asus ProArt PA248 connected via Display port, and the other is actually a 32inch Toshiba TV connected via HDMI.

This setup ran fine for years and then one day I started getting a random black screen flicker, some details about the issue:
- Both monitors flicker together, it isn't isolated to just 1 of them
- Happens every 5-10 seconds, randomly
- It can go for days without any issues, and kicks in randomly at random times
- There's no colors mixed into the flicker, it's pure black

Some troubleshooting steps I've tried
- New cables, no luck
- Messing with every driver I can find, stock windows drivers and all versions of Intel display drivers
- Someone suggested I bypass the built in Intel display adapter and MB ports & drivers so I bought a cheap GT 1030, was fine for a couple days then the exact same flicker issue started back up, so the issue doesn't even seem to be display/driver/graphic card related
- Booting into safe mode the issue went away, it could have just been a random coincidence but I found it interesting that the issue stopped while I was in safe mode

My PC hasn't changed much over the years so all the obvious troubleshooting hasn't led anywhere, I'm not sure where to look or what to try next, the PC is a little dated at 6 years but still runs fine otherwise I'd hate to have to build out a new system just because of this issue.

 

Second Monitor is Blank after Windows 10

My setup is a Dell Inspiron 2350 with HDMI to second Monitor, a Dell P2815Q. After upgrading to Windows 10 and updating all drivers and Bios, my second monitor is blank. The system recognizes the second monitor and on very rare occasions, my second monitor
will work, but within a minute, it begins to derez, flicker and go black. I've tried new cable, different refresh rates, and screen resolutions with no luck. Any suggestions? There is no alternate video output rom the Inspiron to try. Thanks for any suggestions.

 

Second screen with dual monitors randomly goes black

I have three Displayports, I swapped them around but it's always the "second" display that is going randomly black.

For example if I change the settings for my left monitor to be the Main monitor, then the right(second) one would cause flicker.

And If I change the right monitor to be the main monitor, then the left(second) monitor would flicker.

So It's more like the settings I think?

If I use 1x HDMI on second and 1x DP as main there is no problem. If I use 1x HDMI on main and 1x DP as second, the DP(second) one flickers.

EDIT: yeah.. the port of the monitor is broken. I used HDMI on that monitor and it works. So I'll buy an adapter DP - Mini DP for my VR.

Thanks for helping Andre!