Blackhole 3.0.4 Youtube tv with sound but no video

Can someone help me please? Since yesterday YouTube Plays on my tv with Sound but no Video. I can see the Pictures of all the pre-videos but when I click on any Video it starts to Play but only Sound. I have flashed and re-flashed the blackhole Image to no avail. The result is always the same. I need YouTube. It was working quite fine. I did absolutely nothing to it. Just of a sudden I get only Sound but no Video on YouTube. I am using Vu+duo2 3Tb. Blackhole 3.0.4. I have the same Problem when I Flash blackhole 3.0.3. Please help me somebody. Sorry to bother you guys. I surely would appreciate some Kind of help on this matter. Thanks in advance.