How do you turn on a zune?

For a Zune, it's to hold down the play button until the screen comes up with a Zune logo. As for the Zune HD I'm not sure, but I suspect it's the same thing of pressing a button. If this doesn't work check the hold button, and if it's on turn it off. If that's not the problem, try charging it. Chances are then that it's so dead it can't muster the energy to show the "low battery" symbol.