Stuck in DFU Mode -- need help
Hey guys, my friend's iPhone was working fine and now it's stuck in DFU mode, when I turn it on, it's a black screen all the time.
Tried 3.1.2, .3, 4.0, nothing seems to cut it... I've tried on both mac and Windows, and I keep getting errors when restoring, on mac iRecovery doesn't see it so I can't do anything with it...
As soon as I plug it in it says it's in recovery mode and my only option is to do a restore.
When I try to restore I usually get:
The iPhone could not be restored. An unknown error occurred (6).
I also get error 1604 with 3.1.2 on Mac which doesn't even move the progress bar.
3.1.2 on Windows gives me error (6) also, and the progress bar on the iPhone gets to about 55%.
3.1.3 on Windows gives me error (6) also, and the progress bar on the iPhone gets to about 65%.
4.0 gets the furthest progress bar on the iPhone, but it never goes all the way, and I never get errors 1011, 1013, 1015, which would allow me to use iRecovery, it's always something else.
What can I do/try? What do you suggest?
Update: I guess this is the reason 3.1.2 doesn't work -- Apple stopped signing it... http://www.hackint0sh.org/f203/109567.htm
Still can't get 3.1.3 nor 4.0 on it...