Fix loose contact?

The display of my laptop becomes very dark (almost black) when I change the angle of the 'screen', which is safe because of poor contact. Now I wanted to ask how I know which cables are not where they have to go and how I can fix the loose contact again.

Could just be because of the Winkle how you look at him.

If you look from the wrong angle you can see almost nothing.

Depending on the type of screen, the brightness of the display depends on the viewing angle. This is especially true for TN panels. If the screens are weak, the optimal viewing direction changes.