I think my NC is bricked. I have nookie froyo installed internally and it was working fine. I was reading a book with the nook software from the market, and i put the NC down for a minute to get my daughter to stop crying. Came back to the NC and it was black screen. I have tried every button combination holding them all for 30 seconds, then even a minute and nothing will happen. When I hook to USB I dont get a green light or a yellow light, but it is kind of a mix of the two? My computer does not recognize the NC. Any ideas?