The adhesive that secures the logic board to the frame is very strong. To remove the board, follow the next steps to weaken the adhesive using high-strength (>90%) isopropyl alcohol.

Prop the left side of the iPad up against an object so the isopropyl alcohol can flow under the logic board.

Apply a few drops of isopropyl alcohol along the left edge of the logic board.

Be careful if you're using a syringe with a needle or other sharp instrument to dispense isopropyl alcohol—a punctured or bent battery may leak dangerous chemicals or cause a fire.

Let the alcohol soak for one minute to soften the adhesive under the logic board.