I have a 5G iPod with some issue with the audio circuitry. If I play something with Rockbox or the original firmware, the time doesn't move. I also hear no sound whatsoever, including no noise. With sensitive headphones and another iPod I hear clicks when putting the iPod to sleep, waking it up, or plugging in headphones. The working iPod also wakes up if I plug in headphones. Other than this the iPod functions perfectly. Any suggestions for what could be wrong? Is there any information on the circuitry out there, such as at least a rough circuit diagram? I'm wondering if maybe the analog section receives power separately, and that is not being supplied.
Edit: There is suspicious white residue in the power supply section of the motherboard, between the two Philips chips. One tiny component seems especially affected, and there was a dot of green on a pin of one of the big chips, like corroded copper. I don't think it can be an external leak and I think one of the two bigger nearby capacitors may have leaked.