MBA late 2010 black screen, external monitor works

Hallo everybody,

I'm pretty scared right now and I hope you can help me.

Specs:

13' MacBook Air (late 2010)

2,13 GHz Intel Core2Duo

4 GB 1067 MHz DDR3 RAM

NVIDIA GeForce 320 M 256 MB

OS X 10.8.5 (12F45)

I never encountered problems with this MBA. Installed the OS X update a few hours ago, since then my MBA has a black screen.

Rebooted several times, nothing changed. It's connected to an external Samsung monitor, which is working flawless - still nothing but a black display on the MBA.

Any help would be highly appreciated - thanks in advance!

Best,

Oliver