My iPod nano's switch is stuck; can't get it to come on?

My iPod nano's switch is stuck; can't get it to come on?
My nano suddenly will not come on. The switch seems to be loose. It comes on when on the dock, then won't work when removed from dock,

ANSWERS:

Jane Fisher, it would be great if you could tell us what iPod you have. Also you mentioned a switch. What switch is it and how long had it been loose. If it works okay on a dock but not when it is off, I'd go with a new battery first and see what develops from there. Good Luck.