I saw some videos and read some info about it but I am pretty sure it's a stuck pixel. I got this monitor a month ago, I didn't see any issues, I always verify for issues. It's an IPS/Odyssey G4 240HZ. There's just two pixels but as I verified with UDPIXEL, it only appears against a red background, on the green and blue it doesn't appear anything at all, not even a shadow or semblance of it. It's confusing. In game, it appears against some background but not others. Lost at what to do since I can't RMA it. Samsung doesn't classify 2 dead pixels as significant.