HP HPE ProLiant DL120 Gen9 Maintenance And Service Manual page 49

Disconnect each power cord from the power source.
a.
Disconnect each power cord from the server.
b.
Do one of the following:
4.
Extend the server from the rack (on page 30).
o
Remove the server from the rack (on page 33).
o
Remove the access panel
5.
Disconnect the optical drive cable from the drive.
6.
Remove the optical drive:
7.
Four-bay LFF drive model
o
("Access panel" on page 40).
Removal and replacement procedures 49