My iPod 3rd gen doesn't start, it shows the Apple logo then it disappears and the HDD keeps spinning. I got it into diagnostics mode, ran all the tests and the Firewire ID showed the "FW FAIL" and in another test I also got the "1394 FAIL" which I think is also firewire related.
I believe this might be a problem related to a component inside the logic board or the power management IC. I would like to know how I could test the components to check for a short or if anyone has experience with this type of failure could point the components that handle battery and firewire power in the logic board.