Create about a 30 degree angle between the rear casing and your workspace, lifting the casing by the top end. I used 3 decks of playing cards to prop up the casing from my workspace.

Lift the main board from the rear casing at the bottom, making sure the volume dial clears the screw retainer post. DO NOT COMPLETELY REMOVE MAIN BOARD!

Once free, set the main board back down on the casing.

You are now free to desolder any of the contacts that need repair. In my situation, I will be examining the volume dial and will not need to desolder.

Good luck!