New Iphone 4 stuck in DFU Mode
In the morning it was as if nothing was wrong. The iphone was functioning normally. I took some pictures of the snow outside the house and it froze again. Trying a new tactic I tried restoring the phone, which came up with errors 1603 then on a retry, 1604, then 2009, before inexplicably illuminating and going into recovery mode. I then managed to restore the phone and use a backup to put the phone back to how I want it.
Bit later I wanted to add some photos to the iPhone so I added them into Itunes (10.1.1) and synchronised. The screen went dark immediately after plugging it in and has been black screen (as in looks like its powered off) all day.
I have tried holding the power button and home for 10 seconds, then taking finger off the power to put it into DFU mode, but the screen still stays dark.
I have tried holding the home button when I plug it in, but that just seems to screw my drivers up and I get USB device not recognised. I have to reinstall the apple mobile device drivers.
I have tried another computer and another laptop, but no matter what I plug it into, it says the phone is in recovery mode and needs to be restored, yet the iPhone screen is still black, leading me to assume its still in DFU mode.
I have an appointment with the Genius Bar on wednesday, but this is ridiculous, I've never had this much trouble with my other phones before.
How can I get my phone into a stable condition? Or at the very least, somewhat usable?
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Iphone 4, iOS 4, iOS 4.2.1, Itunes 10.1.1