Adhesive secures power and volume button board to the front shell.

Insert the point of a spudger between the motherboard and the left side of the button board.

Use the point of a spudger to push the button board out to separate the adhesive securing it.

Grip the board itself with blunt nose tweezers and remove it.

During reassembly:

If you're reusing your board, the leftover adhesive should be sticky enough to adequately secure it.

If your new board comes with pre-installed adhesive, remove any linings and use a spudger to press the board into place.

If your board doesn't have adhesive or the leftover adhesive isn't sticky enough, use strips of thin double-sided tape such as Tesa Tape to secure it.