PC Help plz

Yesterday this annoying red line come up on my screen. I have no idea what it is and wondered if anyone else may know.
Screen is a Hyundai, L90D+, 19" LCD, 8ms Respond 700:1, DVI
That to mean means nothing I am reading off reciept. I got it a year and half ago surely it has a bigger life span than that
... Doesn't it
Excuse flash on screen

Screen is a Hyundai, L90D+, 19" LCD, 8ms Respond 700:1, DVI
That to mean means nothing I am reading off reciept. I got it a year and half ago surely it has a bigger life span than that


Excuse flash on screen
