Display is not working
after I start my laptop the load-screen is shown for about 10 sec after this the screen turns black. I know the laptop is still working and Windows is loading but without any graphic.
When I connect the laptop with an external Display, it works and I see the desktop external. This means the graphic card works but the laptop-display stays black. When I push the function button with f6 the lightning button the screen appears for some seconds on the laptop-screen and again nothing. What could be the Problem?
Thanks in advance.