So I just bought a new dual quad core.. and plugged my speakers in (which work on my g5 tower) and.. nothing. I plugged the same speaker jack into the front headphone jack on the front of the tower... and it worked! So I sent it back to apple and got a brand new tower... I HAVE THE SAME ISSUE on the new one!!!
I am not sure what to do now... any ideas? Did they change the type of speakers you can use on the new?