My computer: Dell Latitude D620
I have these lines going horizontally across my entire screen making it completely illegible. So naturally I replaced the monitor. However similar pattern of distortion appeared here too.
So I figured the graphics card may be faulty so I tested the external VGA port. But that displayed perfectly fine!
I even tried connecting the the LCDs to another laptop (which had the same input), and I was able to see the display was working (even though the backlight wasn't but that's probably because it wasn't the correct model for that laptop).
So if anyone could suggest anything that may point to what's at fault or how to go about fixing this I'd be most appreciated.