Hi. I replaced my 2nd monitor with a 4k monitor a few days ago and now my XB271HUAbmiprz has started crashing to this weird static when putting videos to fullscreen. If I power off and on again it goes away though. Also noticed a while back there seems to be a cluster of dead pixels that show on both black and white backgrounds. Are there enough dead there to be covered by warranty? Predator is running at 165Hz 1440p via DP and 2nd monitor is running at 4k 60Hz vai DP. Using an RTX2080 with most recent drivers. TIA.