15. Carefully align and place the heatsink back onto the APU.
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16. Secure the heatsink by tightening the 4 spring-loaded screws in a diagonal pattern, doing only 1-2 rotations per screw until all are equally tight.
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16. Secure the heatsink by tightening the 4 spring-loaded screws in a diagonal pattern, doing only 1-2 rotations per screw. Don't worry about overtightening them, they have a mechanical stop, you'll feel it.
17. Reattach the 2 small screws on the sides of the heatsink.
18. Return the blowers to their original positions and secure with their 6 screws.
19. Replace the sealing tape between the heatsink and blowers (if it's too damaged, electrical tape is fine).