My iPhone 6 wont restore. Error 1005 - possible hardware issue

HI

I have an iphone 6 and it crashed whilst using an app. It previously had pop-up notifications saying that I needed to update the system to os9 - I didnt get around to this.

Eventually the phone had the "connect to itunes" message. When I plugged the iphone into my mac it first showed an error of not being able to update and that it need a full restore.

It failed to restore (error 27) and then when I tried again again I got the 1005 error message.

I took the phone into an Apple store and they said they couldnt fix it. They took out the battery and tried to restart it - no joy.

My phone is now just showing the itunes message. - Is there any way of fixing the issue myself?

Kind regards, Livvy