I just bought an Mac mini and when i connected it to my Bose V35 surround system the screen started to flicker. I logged on the mini using screen sharing via my iMac and changed some of the setting under midi options. After hours of testing and searching the net i found out that using 2 ch stereo sound work fine - no flicker but when changing to 8 ch -16 bit and 5.1 the screen starts to flicker (this is the setting appele told me to use) Have talked apple support, they didn't have an answer to the problem. Will call Bose later this week to see if they know anything about this issue but i think the answer will be the same as apples, have anyone here had this problem???