Lay the iOpener over the plastic tab to loosen the adhesive. Let the bag sit on the device for approximately 90 seconds before attempting to open the panel.
Use a metal spudger to carefully pry near the Lightning connector and under all parts of the front panel assembly: the front glass/digitizer, the LCD display and the metal midframe.
The adhesive under the metal midframe/display assembly is quite strong and the components are fragile, so go slowly and gently. Make sure you do not bend the LCD screen.
Gently pull the logic board assembly out of the rear case.
If there is any resistance, there may still be adhesive securing the cables or components. Do not attempt to remove the assembly without further gentle spudgering.
Fixing the headphone jack is super hard. I've been working on mine for a few months. And Basically I ordered the part on ebay (headphone jack, the power button is attached) and I pulled it apart, opened the ipod and swapped everything out (pay close attention to where pieces go cause there's no YouTube videos on how to do it yet) but there is a small piece attached to the ribbon cable near the headphone jack (it's square shaped, with looks like little grid thing, not sure the name) and it has to be perfectly lined up and contacts have to be touching for the power button, volume controls, an headphone jack to work. And that's where I'm stuck cause you can't use adhesive or it will block the contact points. So if you can find someone to replace your ipod parts it will be much easier.