greetings all, any advice on the below would help me a great deal. For a while now my mac has been giving me distorted sound out through the sound line-out at the back of the computer. just had a quote for a repair and the bloke reckoned even though its just a dodgy little line-out issue (ie. just the jack), it requires the replacement of the entire logic board. the guy said that the headphone line-out on the front of the computer is fine so use that with my external speakers. i always thought tho it wasn't a good idea using the headphone line-out at the front of the machine as it worked at a different frequency or somethin.. can anyone confirm this? if its no drama's, i'd rather use the front line-out than shell aus$1000.