try it already same problem after restart or reconnecting the cable wireyou can check your connection wires or reset your pc
i got no video card bro.I guess its a problem with your graphics card, do you have integrated graphics?
Are you using HDMI or Display Port?When iI watch video on youtube or netflex my screen view turns purple and green and sometime it crashes. what to do?
Then Replace HDMIi think problem is on hdmi or in monitor connetting things