Last night my iPod's battery went all the way dead, just like it has in the past, and when I plugged it in it never came back on. I left it to charge all night and it didn't make any difference. I have tried 4 different chargers and none of them are doing anything. Any trouble shooting ideas for me? P.S. My warranty is up so I am willing to dismantle and do any repairs that you think might help.