Laptop screen knows, can't shut down what to do?

My laptop just dropped me from a shelf (about 10 cm) and now the screen is completely white and can't be shut down nor really boot up, at the top of the screen you can see only a narrow flickering strip,

what should I do?

Turn off

Heavy hardware damage board possibly graphics.

"can't be shut down"

But he has a power switch

And what exactly can I do there now?

Unfortunately, the switch brings nothing, when you press this is purely garnichts and the actual battery can't be brought out in this laptop

First of all, try to achieve a complete reset.

(Remove battery, if possible / press reset button, if available / allow battery to run dry by operation without power supply unit).

Then you can test whether an external monitor is detected to limit the error.

If you have the same error after reboot, the hardware is damaged. I'm afraid that's the case with you.

Sometimes they are simple mistakes that I can fix, e.g. A slide-out foil shutter for display control. If the display panel is defective (external monitor funzt), there's a suitable replacement for many notebooks. However, the change is quite demanding depending on the notebook. Even the motherboard can't have survived the fall, but this is a suspected repair and only useful if you get a used cheap.

(in my last notebook catastrophic failure, only one plug was loose, which made sure that USB-C and charging function did not work anymore)

Then get him for repair

Thank you first for the detailed answer! But unfortunately I can't take out the battery with the laptop

So connect as the first external monitor to see if it provides a signal. If you have configured your notebook wisely, pressing the power button a long time will also turn off the power.

My laptop works again many dear thanks!

That pleases me!

Seems to have done, very well.