Unbootable iPhone 5 in DFU mode won't restore in iTunes
I recently acquired an iPhone 5 from a friend. He gave it to me because it wouldn't boot, and I'm the "top tech dude around", and he thought I could fix it. I thought that I would be able to as well, but I was quickly shut down when I found that when I put it in DFU mode (I could tell because it would show up as DFU mode in iTunes) and tried to restore it, with the offline iOS 7.1.2 ipsw that I downloaded from the Apple Developer Member Center, everything would go perfectly well until it came to the point where it "waits for my iPhone.
It waits... and waits... and waits... and waits... and waits... until eventually, I am presented with this error report:
I googled the error code, like a good tech dude, and I came to this site:
iOS: Restore errors 4005, 4013, and 4014
The only things that applied to me were a new cable, and updating iTunes, as I had a slightly messed up cable, and I was unaware that a new version of iTunes had been released. I haven't been able to test it on a different computer yet, but I will as soon as I can, but I don;t know that it will make that much of a difference.
None of these things have worked so far (in exception of the different computer thing, of course, because I haven't been able to do that yet), and I am out of options. I would really like some assistance with this ASAP, as my friend is really wanting his iPhone back, and it is pretty much brand new. I don't know what he did to it, because it has absolutely no physical damage or flaws to it yet, as he has had it in an Otter Box the entire time he has had it.