HPE ProLiant ML30 Gen10 Plus Maintenance And Service Manual page 46

4. Remove all power:
a. Disconnect each power cord from the power source.
b. Disconnect each power cord from the server.
5. Disconnect all peripheral cables from the server.
6. Do one of the following:
If the server is in tower mode, place the server on a flat, level surface with the access panel facing up.
If the server is in rack mode, remove the server from the rack .
7. Remove the access panel .
8. Disconnect the drive power and SATA cables.
9. Remove the non-hot-plug drive cage.
HPE ProLiant ML30 Gen10 Plus Server Maintenance and Service Guide 46