Hi I solve the problem! I flashed a experimantel Image from 8.10.2010 and it works with ERSTE HD and Zweite HD. So I was happy that there is no hardware problem. And the I flash another Image (not orrignal) and this will work too. And I exchange my tuner, I had a new one there. So my problems are gone.
Good for you... the freezing issue is a clear sw issues, while the rebooting is not!
below the link as requested
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