HP EliteDesk 800 Hardware Reference Manual page 31

17. Press the solid-state drive down to the system board and use the included screw (3) to secure the solid-
state drive.
18. Set the hard drive cage (1) into the chassis.
19. Secure the hard drive cage to the chassis with the three screws (2).
20. If your model is an EliteDesk 800 65W, replace the secondary fan under the hard drive.
a. Set the fan in place in the hard drive cage (1).
b. Fasten the three screws to secure the fan to the chassis (2).
Replacing an M.2 PCIe solid-state drive 25