just replaced headphone jack and hold button but still no sound

just replaced headphone jack and hold button but still no sound

My iPod hasn't been playing music for some time now. The clicker still makes noise and I can hear feed back when I plug in the head phones, but when I play a song I don't hear any sound. My library is all there so I don't think it's a harddrive issue. does anyone know what the problem might be? Is there anywhere where I could send it to get refubished?

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