Laptop screen sensor?

ap
- in Asus
3

With my laptop (Asus X50Z) I have the following problem:

When I turn on the laptop (power adapter is on the laptop) the fans turn on, but the screen stays black

On the hardware it can't be eig because I have checked all components and as far as everything was good.

The only thing that can be on it is the folding sensor for the screen (it does not respond to key combinations, as if it is in quiet mode where the screen is collapsed)

Can somehow somehow "start" the laptop he at least gives a picture?

The text is a little longer sry

Ge

Hang on a monitor.

ap

The problem is that when I do this, the external screen stays black, and keyboard shortcuts he does not take, as I said

Ge

It does not sound like it's going to start up.