So, I received a jail broken iPhone 3G from a friend and decided to do a clean reset/downgrade to 3.1.3 . I chose the extreme reset from the iPhone settings menu (the one that takes 2 hours) and let it do its thing. However, now the phone won't fully boot, power down or go into DFU mode. Here are the exact symptoms: -The phone shows the apple logo and then the hourglass appears. -It is stuck on this screen for several minutes and the hour glass spins, but very slowly (literally like one pixel every 30 seconds). -Next the screen will flash or just go blank, the phone seems to power off and then power back on and the process repeats itself. -Through this whole sequence, the phone does not respond to any input. I can't power it off or enter DFU mode. The phone will just continue this cycle until the battery is dead. Is the poor little guy hosed? Thanks.