iphone 5 stuck on apple logo- 4005 error

Dear All,

My phone stopped working last night. The battery went off and when I charged the apple logo started to flash and the phone wouldnt boot.

I did lot of reaserach and almost did all steps on youtube but no luck.

I tried to restore to factory settings and i get 4005 error. My USB cable is original.

I need to get my phone working as it has all details in it.

When I put my phone on power socket : I see apple logo flashing and when I press home n power button it shoes connect to itunes. when i remove from power socket the iphone has black screen with no apple logo. when i connect the usb to my computer again it remaims black screen however after pressing home n power button it gets connected to itunes as seen on itunes page however phone is still with black screen and after clicikng on restore iphone i get - error 4005.

Help pls

Thanks

Dipti