Hi All, I recieved my 27" iMac a few weeks ago and everything has been perfect until a couple of days ago when the headphone jack stopped working. - The built-in internal speakers still work. - Cannot get any sound from any headphones/speakers attached. - Cannot adjust the volume when anything is plugged into the headphone jack. When I try a circle with a slash through it appears. - Under 'Sound' in system preferences the menu reads "Digital Out" and says that it has "no control properties" - Does not work when in Windows 7 under Bootcamp Have tried resetting the PRAM and the SMC....no change. Have tried re-installing Snow Leopard....no change. Is there anything else I can do? Would hate to suffer the massive downtime of sending my computer back for the sake of a headphone jack. Any help is much appreciated!