Before installing your new board, make sure it has a thermal pad. If the board doesn't come with a pad, follow this step to transfer the old one.

Use the flat end of a spudger to gently lift the thermal pad until you can grab it with your fingers.

If the pad breaks, don't worry. Just transfer each piece to the new board.

Use your fingers to transfer the pad to the new board.

Use the flat end of a spudger to press the edges of the thermal pad until it's centered.