I think everyone may know the problem already.
Description of the problem:
On the Oculus Setup I had to adjust my lenses in order to continue the setup process but it didn't work at first. The Rift screen didn't display anything and only sound worked on the Oculus Rift(the LED turned white after putting it on the head).
After a while I've solved it!
MY SOLUTION: http://www.technopaki.at/virtual_reality/2016/12/28/oculus-black-screen-english/