Use a pick or thin plastic spudger to release the mainboard from the top of the frame. CAUTION: there are two metal connectors that can be easily broken or bent, care is needed to make sure they remain intact.

Use a spudger to pry the right side of the mainboard up.

CAUTION: There is also a small metal connector on the bottom that can break easily if bent (Highlighted in the smaller red box). Care is needed when refitting the mainboard.

Once the top of the mainboard has been released, you can gently slide the mainboard up to remove the charger port out of the frame. ( Sorry, no picture of this).