Laptop shows strange horizontal and angular lines and dots on the screen

My Dell laptop has been giving me these strange horizontal and angular lines and dots on my screen with different characters on the text as well. Tried reloading fresh windows and drivers but still the same.

If reinstalling the operating system doesn’t help, it’s definitely a hardware related failure.

First of all, test your laptop with video output on the external monitor.

If both, the external monitor and laptop screen show exactly the same problem, this is the video card related failure. In most laptops the video card is integrated into the motherboard, it means the entire motherboard has to be replaced.

If strange lines appear only on the laptop screen and the external monitor works properly, the problem is somewhere inside the laptop display panel. It could be one of the following:

1. Poor connection between the video cable and motherboard or LCD screen. Try reconnecting the video cable on both ends.
2. Defective video cable. Try replacing it with a new one.
3. Failed LCD screen. In this case you’ll have to replace the screen.