HP Enterprise ProLiant DL380 Gen10 Maintenance And Service Manual page 200

a. Allow the heatsink to cool.
b. Using a T-30 Torx screwdriver, loosen the heatsink nuts.
c. Lift the processor-heatsink assembly up and away from the system board.
d. Turn the processor-heatsink assembly over on a work surface with the processor facing up.
e. Install the dust cover on each processor socket on the failed system board.
17. Loosen the system board thumbscrews.
18. Remove the system board, using the handle to lift it out of the chassis.
Replacing the system board Replacing the system board
19. Install the spare system board.
Removing and replacing the system board 200