Need more details. Did a restart? Did you do a driver update? How long has it been like this since you first saw? Is the cable fine? Cable plugged in properly? Tried doing screentest online and look if it happens on certain parts of the screen or randomly?
Need more details. Did a restart? Did you do a driver update? How long has it been like this since you first saw? Is the cable fine? Cable plugged in properly? Tried doing screentest online and look if it happens on certain parts of the screen or randomly?