Sometime the monitor get distored colors, if you have back up monitor try put the back up and connect with your video card to seee if working or still distored colors. or can ask your friend to bring a monitor over to your home to check.. if doesn't work it's got a video card going dies soon.. (which the high fresh rate cause a video card might fried electronic stuffs) I have 3 monitors at my home, 1 dead, 1 on Win95b tower and 1 back up (my brother want get rid of it and gave me to keep it).
Most important alway clean a back of monitor and avoid any stuffs can block a vented area causing overheat would gets yellowish screen..
Use vacuum to suck the dust up over the vented area..
