My 770 that I've had for a little over a month now, turned off and won't turn back on. I know people have had similar problems here in the past, but they mostly seem to be able to reflash their units. The only thing I can get mine to do is flash the nokia screen a few times when I plug in the power adapter. Then after a few seconds it stops. I don't get any response when I plug it in to the computer, or hold down the home key and try to turn it. Any ideas or tips for trying to reflash this?

p.s. the battery should have been at least 3/4 full when it turned off. I don't know exactly. I was using it a little bit, put the hard cover on, and put it in my backpack. When I pulled it out a little while later, it was dead.