iPhone iPhone 4 stuck in DFU after jailbreak attempt

[cmcclure16]

So I tried to jailbreak my brother's iPhone 4 and after failed attempts the phone no longer turns on and is not recognized by iTunes. To top it off, the power button does not work and I suspect that it is still in DFU mode.

Is there anyway to get it out of DFU or to get iTunes to recognize with a defective button?

I have already tried the delete iTunes and AppleMobileDevice.pkg option but that did not work either.

 

[TriJetHero]

it helps if you post which iOS version and which jailbreak method.