Weird triangle on OLED?

[CollectedX]

Hoping to get some help.
 

So I just recently came across an insane deal on an Asus XG27AQDMG for 500€. Never seen a price that good, so I had to get it. Always wanted an OLED.

 

But now 4th day in, while working, I noticed a large part of the corner is off. Looks like it is dimmer. Instantly, I started to play with the settings to see what could be wrong. I know it didn't look like that before because I tested the monitor when I got it.

 

As you can see in the pictures, it is most visible on single-color pages. That's why I noticed it while working on a PDF. You can also see it in the gray gradient one and slightly in the dark blue one, but while consuming content it is not visible.

 

I have no idea what has caused this. Changing settings doesn't do anything. The previous night, when it suggested pixel cleaning, I turned it on, turned off my PC and went away for 10 minutes. The ROG symbol wasn't blinking when I returned, so I turned off the screen (it blinks while the process is going). My mistake might have been turning off my PC right after starting the clean, because trying to do pixel cleaning while there isn't an active connection is not possible.

 

I find it hard to believe it could be caused by interrupting the pixel cleaning process.. Might be though, because it warns not to do so.. Another idea I had was that the sun somehow has something to do with it (the internet doesn't really agree with this and I don't think that's the issue either). On the 5th morning (today), I noticed the sun shining outside was casting a shadow from my 2nd monitor, just like the triangle looks. You can also see this in the last 2 pictures. The shadow is just slightly lower than the triangle.

 

I went to the store with my problem, and they exchanged it for a brand new one. I'm happy with the result, but I can't wrap my head around why it happened. I really want to understand, so I can not let it happen again. In the store at first they started to get documents ready to service it. While waiting one of the workers hooked it up and everyone went to go look like it was something unseen before. They then went to their boss and he decided to give us a brand new one. They mentioned something about a broken matrix or burn in. Doubt the burn in, but not sure about the matrix. Maybe?

 

Would appreciate some insight on why this could have happened. I can only assume the pixel cleaning had something to do with it (or maybe the matrix decided to die overnight).

[GuiltySpark_]

I don't think you or anyone else "did" anything, per say. Just seems like a defective panel that wasn't caught in QA. Shouldn't really require much more thought.

[OddOod]

Welcome to the forums!
Absolutely looks like a manufacturer defect. RMA and try again

[CollectedX]

Thanks for the swift replies!

Already got it replaced, but it does seem weird, because it showed up 3 days later.

Maybe I actually didn't notice it before, but I somewhat doubt that. Even tested it when arrived. Doing so with the new one too right now!

[dogwitch]

4 hours ago, CollectedX said:

Thanks for the swift replies!

Already got it replaced, but it does seem weird, because it showed up 3 days later.

Maybe I actually didn't notice it before, but I somewhat doubt that. Even tested it when arrived. Doing so with the new one too right now!

once panel got to display running temp... for a day or two.

it show up. compare to brief test they do with sample from the line.

[OddOod]

On 3/25/2025 at 11:09 AM, CollectedX said:

Thanks for the swift replies!

Already got it replaced, but it does seem weird, because it showed up 3 days later.

Maybe I actually didn't notice it before, but I somewhat doubt that. Even tested it when arrived. Doing so with the new one too right now!

Yeah, it happens. They likely only test for a dozen seconds in the factory. You just happened to get one that *barely* passed their QA. To them, this is the cost of doing business

[dogwitch]

9 hours ago, OddOod said:

Yeah, it happens. They likely only test for a dozen seconds in the factory. You just happened to get one that *barely* passed their QA. To them, this is the cost of doing business

yep. been there before!