Oh No, My Forerunner 305!

OMG! I get to my Friday run this morning (I don't usually run on Fridays, only when I've been slacking during the week) jump out of the car and turn on my trusty Forerunner 305. What? Turn on! Maybe I need to re-push the button. Nope. What the $#@$? OK, so when I get home I'll simply plug it back into the adapter. Nope, that didn't work either. Dag gum it. What is the problem? Will I lose all my saved data? My last ditch hope is the try plugging it back in and hoping that through some electronic miracle it will "fix itself". I'm no idiot, I'm just hopeful. If this does not work then I will capitulate and send it in for repair or replacement. I cringe at the very notion.