Question Returning phone

I am on 4.4.2 TweakedN3 3.5 And my speaker from the phone on top went out (Not Working no sound) so I am sending my phone back and i need to restore as much as possible I have odin and I need a few derections on where to start I fallowed
Code:
http://forum.xda-developers.com/showthread.php?t=2465764
and i get a fail some help will be appreciated please.