What operating system are you using? If Windows 10, your graphics and processor are not supported.
Thank you for your kind response, sir. I reinstalled windows 7, but the issue still persists. If this might be a problem with the VGA Card, Can it be replaced?
No. The graphics are part of the processor.
And, you do not know what the real issue is. This is a used laptop. Who knows what it has been through.
Personally, I would return it. Then, I would purchase something that is known to be good, and supported.
As far as what you are seeing in the display, my first guess is a loose or poorly connected ribbon cable from the display to the motherboard. Just a guess...