I'm having the same problem right at this moment. Reset doesn't work, I've plugged it in now (then screen changed to charging screen, glad it did, at least it's not a screen problem), but when I unplug, it doesn't react..Neither does the reset button. I already had a lot of freezing (buttons that don't react anymore, and I always had to reset), so I'm getting worried actually...Only have it a month or so :s but I don't think I can miss it anymore
...