So this happens from time to time,

I need to use my Classic II RIGHT NOW.

I might as well be dead if I can't use it in th next few minutes.

The thing won't boot up. You hear the fan and the HD whirring, but nothing on the screen, and no startup tone. What do I do?! It does this sometimes, but then you let it sit for a long period of time ( a few weeks) and it may come back.