Why is my iPod nano not powering on?

Well first toggle the hold switch to make sure it's unlocked. Then try to reset the iPod by holding down the meny and select (center) buttons for about 10 seconds.

If that doesn't work, try plugging it in to your computer. If it responds, you might have to let it charge and/or restore it with iTunes.

If it does not respond at all when plugged in to power, you might have either a bad LCD only, or probably more likely (if you can't hear anything starting up or anything,) a bad motherboard.