That is not a waranty –problem !
We – Grohe destroy the output,
by disconnecting the Hydra-connector plug from the PC-cabinet in a time where runs the pc.
My opinion is our connection to the hydra-cabinet is not okay !
We can send to repair this card,
the only not so good informaion is the repaircost is like the same with tax as a new card.
Again!
Please check/change the hydracabinet like my recomments from y last E-mail!
Otherwise we change the card and the card is after a short time also broken !