Steps to remove the logic board from the device.
Continue to carefully slide the spudger under the Lightning port cable nearest the logic board.
Be sure to work slowly; jerking the spudger may tear the Lightning cable from the logic board.
In the following steps you will be prying under the logic board. Be careful to pry evenly to avoid bending or stressing the logic board. If it is hard to insert the spudger, reheat.
Gently insert the flat end of a spudger underneath the logic board nearest the front-facing camera.
Slowly pry to free the corner from adhesive.
Insert the flat end of a spudger underneath the center of the logic board. Slowly pry to free the section from adhesive.
Lift the end of the logic board nearest the front-facing camera to ensure it is free of adhesive.
Again, be careful not to bend or stress the logic board—make certain that you have cleared all of the adhesive with the spudger.