Screen turns in random color pattern and sometimes in solid color.

Hello,

I have a Dell XPS L502x laptop connected to an external monitor. Whenever i start playing a video game the screen turns into a strange color pattern or a solid color. Sometimes a hard buzzing noise comes out of the speaker. It generally turns into a solid color such as red, blue, green, pink, purple etc.

We tried so far:

- Cleaning the airvents
- Re install windows
- Updating drivers
- Uninstall and re install drivers

i manged to get some pictures of the problems. Which i will post at the bottom together with the specs. I tried a lot of things but it keeps on crashing.

Reserved for pics and specs.

Thanks a lot