iPhone 6 is dead. Please Help

I downloaded ios 8.2 yesterday, but today my iPhone 6 abruptly stopped working. The power button, home button, and screen don't work. Tried putting it into dfu mode and plugging it into iTunes, but that also didn't do anything.

I got it to register in iPhone recovery mode but it gets stuck "waiting for iPhone." Then a message with Recovery Error 4005 pops up.

Can someone help please?