Dismantle the back(take off the back armor) and you will see two to three screws. Put on your headphones and play music while you are doing this. (do this for each screw seperately and make sure it's only the screws for the headphone jack). before very careful taking off the back also. What you need to do is while your headphones are plugged in, loosen or unscrew one of the screws. After, push in your headphones and adjust them to where both headphones work. Once both working properly, hold the headphone in place and screw back in the screw/tighten it. Once this is done for all screws, your ipod should be fixed.