ZDF HD Unitymedia black screen, all tuners used

[kosemuckel]

Hi,
since yesterday i cant watch ZDF HD Unitymedia anymore - screen gets black, sound is detected as DolbyDigital but cant hear it. Thats all, no picture, no sound. When switching then to other channel MCE tells me all 4 Tuners are used. So i need to restart MCE to watch other channels then.
I use DVBlink (Server is on same machine) and in other programs i can watch ZDF HD (VLC, MediaPlayer(!), also Android App DVBlink).
So it seems its just MCE not showing this channel. This installation was running stable for a long time, no changes on my side.
I tried already: MCE reset, Update HDHomerun, rescan in DVBlink - and a complete system restore. Nothing helped.
Any suggestions?

[Crash2009]

in WMC, try running the DVBLink client. I forget exactly where it is, might be up in the extras.

[kosemuckel]

Thanks, but did not help ...