No Audio Plays ...

Hi,

I tried searching through the forums for this and couldn't find anything specific to my question so I hope I am not repeating someone.
Anyway, I've had this non-functional 4th gen 30 gb ipod for a long time but it only lived 33 hrs before this problem and it has just been collecting dust since then. It seems to work fine but produces no audio at all, ever, unless you count the clicking noise when you scroll. I took it to the Apple store and they plugged it in to several different speakers and it worked. It doesn't work on any headphones/speakers I own but after I brought it back from the Apple Store it worked for about 5 seconds and then the audio cut out again. I've tried resetting it and everything. In diagnostic mode the "audio" option is not even present in any menu.

Any ideas?

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