Just thought I should mention that my 770 is behaving badly with a variant of this booting problem -- the WSOD (White Screen of Death). 770 was behaving fine, rebooted it one day and the screen brightness went all the way to full white. Unit will not display anything except full white. Tried several reflashes and it seems to complete and will reboot but immediately the full white screen comes back. 770 responds to some touch screen areas with beeps but its impossible to know whats going on. I've tried removing battery power and letting the unit sit for over a day and then re-inserting power and AC power cord, still no luck. Nokia tech support had no ideas and they suggested a warranty repair. I'll try flashing with the full original firmware image again, but I'm not very hopeful. Looks like its time to send it back to Nokia and hope they can do something with it.