My 3 yeard old MAG 15" monitor suddenly goes black with a very bright
horizontal line smack in the middle of the screen.
Even if I power off and then on, it stays the same.
But if I remove the signal cable from the PC's video card (while PC is on)
and then plug it back and then turn the monitor on, everything goes back to
What could be causing this ?
A defective monitor ? Or a defective video card ? Or software / OS settings
How do I determine ?