In the service the old one worked but they gave me a new one after all and now it works again
I think that the problem is the bad solution for cooling nForce "Media Processor".
Something probably died because off heat
Aluminium block is glued with some cindof pink sticky shit
I think just putting a standard silver thermalpaste will be fine but i dont know how to remove the fat sticky shit on the Chip.
Does someone know how? Please help!!