I have a PG279Q for my main PC monitor. I have been playing around with my new XB253Q GX on my second PC for days now. I haven't started my main PC, with the PG279Q, for about 8 days. When I fired it up today, there were several light pixels on the screen. One was bright enough for me to see sitting back in my chair. When I came in close to the screen I could see several much lighter pixels doing the same thing. I tried several other cables, including HDMI and the same issue was present. It they weren't stuck pixels or dead pixels, as they were just a faint (lighter) version of the color displayed on the screen. I also tried several ports on the graphics card. I turned off the 165 overclock. The issue still persisted. As I was using the screen, I noticed that the issue started to go away. I could still see the pixel issues, but I REALLY had to look for them. Now, there is no problem at all. Is this something that can happen when not using the monitor for long periods of time? Or, is this just an indication of what's to come? A malfunctioning monitor?
 
Not sure that it matters, but I have a 2080 Ti graphics card.

Sajin
An indication what is to come imo.

That sounds fun. Having issues with both setups now...

Sajin

Wait, are you, myself and Heavy Hemi the only ones around here anymore? It sure seems like it right now. Anyway, I shut down the monitor for a few hours and just started it back up and everything is fine, no pixel issues. Kind of weird, but if I look closely there are tiny dark spots when the monitor first starts too. You have to look really close, but they are there. I noticed this in the past and never thought anything of it. After the monitor warms up, its perfectly fine. It does really concern me, because this is my favorite monitor of all time!
 
Anyway, I'll post back if I keep having the issues. I think I'll watch it for a while and see what happens. You've been a lot of help in both of my threads Sajin! Thanks.

chrisdglong
Anyway, I'll post back if I keep having the issues. I think I'll watch it for a while and see what happens. You've been a lot of help in both of my threads Sajin! Thanks.

Ok. No problem.

Very strange. Never seen anything like that before. Have you reached out to asus to see what they have to say about it? To me it seems like the pixels aren't working to fully capacity until they get warmed up.

Sajin
Very strange. Never seen anything like that before. Have you reached out to asus to see what they have to say about it? To me it seems like the pixels aren't working to fully capacity until they get warmed up.

Yeah, they pretty much told me to just allow the monitor to warm up and move on. Asus has been TERRIBLE with their tech support for me lately.

It could be faulty pixels it could just be they need to warm up. I'd run some color calibration programs to see if it helps.

Whenever I did notice a stray/faulty pixel was happening on one of my monitors I'd put up a pure white image on full-screen at maximum brightness for a few hours to make sure everything was calibrating correctly...

It might be the OC setting to 165Hz. I did turn it off when the pixels were weird the first time and at that time it didn't do anything. However, last night I turned off the OC and went back to 144Hz (165Hz being the OC setting in the menu that is claimed in the marketing of the monitor) just before bed. I woke up this morning after about 11 hours of the monitor being off. I did notice what is in the picture that I posted here, but VERY slightly and it went away pretty fast. I'm guessing that the OC on the monitor was never really stable, at least not in a "cold" state. However, it also seems like 144Hz is not fully stable either in a "cold" state, because what is in the attached image does still happen. It just happens for seconds rather than minutes and it's significantly less. I'm sure that what is in the image was probably happening all along. I only noticed it because I had my nose up to the screen looking for the other issue.

Guess so.