IPhone 5 :: Unknown Error While Updating To IOS 8 Or Restoring

A few days ago my Iphone 5 screen went black and would not turn on or anything but it would still vibrate and if i held down the home button the little siri sound would go off. This had happened once before a short while ago and i just let the phone die all the way then charged it and it worked fine so that's what i did this time. When it came back on this time though, it was still just black but it would also be flashing the apple logo.

I tried a bunch of things that people were suggesting online and watched youtube vidoes but nothing seemed to work, also every once in a while it would go to the lock screen and i swiped and pushed home and stuff and nothing would happen it just said it was searching where it would usually say verizon. Once while the screen was doing this i held power and the home button which is what many of these youtube videos said to do and it worked, telling me to connect it to itunes for the recovery process.

Once it was connected to itunes i tried to update it to ios8 and it seemed to be working at first but then it said unkown error and when i tried to restore it the same thing happened, i tried both of these multiple times with the same result.

Info:
iPhone 5, iOS 7.1.2