Hei everybody, i was trying to use USB DRIVE and i set it up to drive only mode.
Then i tried to boot a linux distribution from the usb that was saved on my iphone ( 2g 3.1.2, blacksn0w)
The result was nothing got boot on the computer, but the iphone got a black screen and got stucked on it! It's all black, and nothing seems to wake him up.
To be added to that i've got a broken sleep botton, so i cannot try manually to do a hard reset....
You don't unlock your 2g iphone with Blacksn0w.
Since you are at dfu mode, try to do the shift + restore to 3.1.3 and then jailbreak with Redsn0w 0.9.4 from Emergency screen. You will need to point to 3.1.2 ipsw. You need only to check the box : install cydia and unlock only. Do not check already pwned.