I alive one 6600. I use griffin and I flash only the MCU and PPM (hiest version which I have) and the phone powered up. My be this phone dead only software, so your phone my be have hardware problem. If have u must first done the hardware problem and then flash MCU and PPM, and phone must be alive. I alive one 3100 in this way - furst repair the hardware problem, and then I flash phone with MCU and PPM. So Good Luck.