I got myself an Asus PG279Q monitor - the famous backlight bleed gamble monstrosity. I knew what the risks are, but since it's such a great monitor - I decided to take a leap of faith.
The unit I got had an average amount of backlight bleed in 3/4 corners, mostly in the top-right corner. Nothing too dramatic and far from some horrible examples you can see online.
However - I could see it, so I decided to fix it.
SOLUTION:
Step 0. Do not do anything to the screen itself. It's all about the plastic frame/bezel around it.
Step 1. Start the backlight bleed test on KZitem and go full-screen. Just type that in and look for the video.
Step 2. Find where the backlight bleed is and more importantly - where the source(s) is/are.
How to find the source?
Imagine BB like a flashlight. The light source (bulb) and a less-bright area around it. The source is the point on the screen from where the light source comes out and disperses BB around the area, creating a big area of the screen with a brighter colour tone.
You should easily pinpoint each of these sources, as they are close to the edge, right next to the plastic frame/bezel.
Step 3. When you locate these sources, pinch the PLASTIC FRAME/BEZEL OF THE MONITOR RIGHT NEXT to the BB source.
Pinch, as in, put the frame/bezel in between your thumb and pointer finger and start to apply the slightest amount of pressure, and SLOWLY, throughout 5 seconds or more (so GRADUALLY) start to increase the amount of pressure on the frame until you see BB is retracting.
While increasing the pressure, at the point where the backlight bleed is completely gone (so it looks like the normal screen section) you need to STOP and HOLD that pressure, so keep your fingers at that exact place, with the exact pressure - for 3-5 seconds. Then release very slowly.
Step 4. Repeat and repeat until BB is gone. It's always a bit less noticeable upon each cycle.
It can take some time. So, whenever you can, turn on the backlight bleed test and make sweet love to it.
I find that the holding part is the essential one, as if the frame is "accepting" this new shape/position.
You might hear some slight cracking sounds. This means that the frame was not assembled properly and now fitting into the correct position.
The frame is a few millimetres bigger than the screen, so it hasn't been perfectly assembled.
The solution lies in forcing the frame to accept the correct position - nothing to do with the screen itself.
Let me know your results.
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