StLive crashes after a while....

...even when doing nothing!
It's the 2nd time I'm worring bout this problem! 1 year ago the same happend - the mains supply unit was gone, so I got a warranty repair... Now one year later the same??? That cannot be true?! Now warranty is expired and I cannot work during repair...

A known problem, or do I have a kind of 'special luck'? Now I'm waiting for an answer of my local dealer and 'Hyperactive-Germany' and really hope for good & helpin' news....
Working with Studio One 2 on an I-Mac, FireWire connected -all Updates (Soft-/Firmware) done!
regards - Tom