My 24" Apple Cinema Display is about six months out of warranty. I've tried both my 15" i5 MBP and my MacBook Air with the same result: The USB ports at the back are dead, I get no sound from the monitor speaker (it still routes through the laptop speakers, such as they are) and the iSight appears dead as well. Would anyone be able to give me an idea of the problem without my carting it to the Genius Bar first? Since the display works normally otherwise - the marvelous display itself is unaffected - I have to assume that the problem lies either in the USB cable or connection, or in some sort of internal USB/Speaker/iSight bus. If anyone knows how the current crop of ACDs is constructed, or if you've taken yours apart, I'd be pleased to hear from you. Thanks for your time!