As the title suggests, my 770 is not powering on. I do not get a white screen, charging logo, NOTHING, just a black screen (no power at all). I have tried taking the battery out, cleaning the contacts, I even took the thing apart to make sure that the charger port was still good (though I realized afterward I could have just taken my multimeter to the battery pins with the battery out... oh well, lesson learned). Has anybody else seen this? The last time I used it, the battery ran dead, so I went looking for the charger. My fiancee uses the charger with her phone. I pull the charger out of her phone, and only the inside of the charger pin came out, not the outer cylinder. I pulled the outer cylinder out and tried to fix it, then use it... it didnt charge. That is why I had to check the terminal. Thanks in advance!