My iPhone 5 doesn't turn on

Hello every one,

I changed my iPhone 5 last May because it wasn't working the home and sleep buttom.

So I used the recall and got a new iPhone.

However, in the middle of July, my new iPhone started turning off and on automatically until it doesn't turned on anymore.

I tried restoring it using iTunes but it doesn't work. When the black apple appears with wihte backgroung and it shows a little scroll bar loading the restoration, the background and apple change to purple, red, gray and it turns off again.

Then, the iTunes shoes a message of error 9.

Can you please help me?

Thanks and Regards,

Bruno Araujo