Screen turns white then blackish

[City]

So, sometimes on my laptop, the screen goes white and then black, somehow. I tried googling it but couldn't find anything useful.

Atm, I'm using an HDMI cable which works perfectly fine while my "primary screen" is still white/black.

Any idea what the problem is?

 

[Resource]

Can you film it or take a picture of it? Hard to say anything without any photographic proof..

 

[City]

Can you film it or take a picture of it? Hard to say anything without any photographic proof..

Added a picture, just in case it would help. As you can see on the picture, there's dark lines across the screen for some reason. Rest is just plain dark grey, it's usually darker than shown on the picture, camera effects or smth.

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The screen has been black for hours now. :s I think it's worse now than it was before. Before, when it happened all random, it happened when I either touched or moved the screen.

 

[Master-m]

You spilled some fluids on the screen? If not then your connector might me looses or broken. Or maybe you dropped something on it? Punched at it?

 

[City]

I haven't spilled anything on it, nor have I punched it.

What do you mean by connector?