Chosen Solution

Every so often, a bunch of blue diagonal lines will appear on my screen, I don’t know why, they just tend to disappear and reappear at random, I think there’s a specific color that triggers this but I am not entirely sure what is causing it, if anyone knows, please tell me

Hi @Mr Chub Try another monitor to check if the problem is in the monitor or not. If the desktop has a HDMI video output then use a TV with a HDMI input as a monitor. You didn’t specify the make and model of the desktop or whether it has a separate GPU card or uses integrated graphics. If a separate GPU card and the CPU has integrated graphics (a lot of Intel CPUs do) try using the integrated graphics option. Also make sure that the video cable is not running parallel next to the power cable for the monitor or the desktop PSU so as to make sure that no interference is coming from the power cable. All this is just trying to isolate where the problem is.

Thing you need to check HDMI/DVI/VGA (whatever u use) check cable wigle them or try another one

try other monitor

maybe grapich card is almost dead, you can try update drivers, or remove them out and try conect to integrated gpu on your pc if u have one.