Monitor flickers with rainbow and white waves and lines on power up.

[Racktoar]

So, a week or so (maybe more) ago my monitor started doing weird things whenever I start it after it being off for a longer period of time.
It starts flickering with rainbow and white waves and lines going across it. After a while when disconnecting and connecting power cord, as well as occasionally disconnecting and connecting DP cable when no signal found appears, over and over it eventually works and works fine all the way until I turn it off for the night.
So, it works, but it has issues at the start, and it's kind of annoying to wrestle with every time I start it for the first time that day.
My primary monitor is fine which is why I'm doubting that it's a GPU issue. Monitor is a ROG PG248Q.
 

[circeseye]

id say one of the boards is starting to fail

[Racktoar]

3 minutes ago, circeseye said:

id say one of the boards is starting to fail

Inside the monitor?

[jaslion]

1 hour ago, Racktoar said:

Inside the monitor?

Yes this monitor is on its way out. Unless you have a severly bad power or dp port cable. So change those if it still happens yeah screens going out.

[Racktoar]

2 minutes ago, jaslion said:

Yes this monitor is on its way out. Unless you have a severly bad power or dp port cable. So change those if it still happens yeah screens going out.

Yeah, I don't have another power cord, it doesn't use the normal one, it has an adapter to it. I could buy and try a new DP cable, though.
Could there be an issue with the DP port on the GPU?

[jaslion]

8 minutes ago, Racktoar said:

Yeah, I don't have another power cord, it doesn't use the normal one, it has an adapter to it. I could buy and try a new DP cable, though.
Could there be an issue with the DP port on the GPU?

Unlikely. However try any other connection on it just to see its not a weird display input detection thing.

 

 

[Stahlmann]

This doesn't look like a cable issue. It's the monitor dying.