I was resetting an older 3g to give to my neighbor. I went into Settings / Reset and chose Erase All Settings and Content. The phone stayed on the screen for quite some time, then the screen went blank. I pressed the power button, and it started booting up and stuck at the Apple Logo. Now, I can not turn it off. I can NOT go into DFU because I can not turn it off. I've held the power button for as long as two minutes - nothing it just stays at logo. I've tried to do the DFU by holding power for 3, then power/home for 10, then just home - nothing. I've loaded up Redsn0w and followed the instructiosn there - same thing because I can not start with the phone OFF. I've let the power drain out completely (since the scree nstays on - this doesn't take long, then held the power button when I plug in the cable - nothing - just boots to logo. I've NEVER had a phone do this before. Any other thoughts? Also, the PC (nor son's iMac) detect the device. I've tried other cables, and my other iPhone works with both cables I've tried. ANY IDEAS? Thanks!