I'm having this same problem, except my phone had more than half a charge when it when black screen and won't start up again. I put it on a few different chargers and cables so that isn't the problem, also tried the computer with the software installed it won't recognise the phone. When i hold down the power button and the volume up button it just blinks the red led once like the others have said no vibration. When i plug it in the charger or computer it does the same thing just blinks the led once. I seen the one post showing to hold the volume down button and plug it into the computer for update i have yet to try it so ill keep my fingers crossed but doesn't sound like that is going to work either when i get home ill try that. I have a bunch of very important information and pictures on my device and don't want another one i want this one to work, or be able to atleast transfer the information to another device, right now it just seams like a fancy blinking paperweight, i cannot even access the phones memory, Phone is 4 months old, very disappointing.
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