I had to open my ASUS ROG PG258Q Swift as a screw fell inside while mounting my new desk arm...and once remounted my eye spotted this.
I have loaded PixelHealer on the spot that I can't understand if it's a bad pixel or some dust that fell inside while opening the monitor in some how. If you'll pay attention you'll see some sort of spot...and it seems to be inside the glass!!
xeromist wrote: The flashing is not helping but it's probably dust. A dead pixel will be completely dark. A stuck pixel will be a fully bright on a dark image.
I'm so sorry for the kind of video I did, I though it might not be nice. I can confirm that today that spot is changing...probably something got stuck underneath and the crystal from the class reflects in some way strange.