HP DL385 - Manual (Page 60)

Hardware options installation 60
4. Open the PCI riser cage door.
CAUTION: To prevent improper cooling and thermal damage, do not operate the server unless all PCI slots
have either an expansion slot cover or an expansion board installed.
5. Perform one of the following:
a. If you are installing an expansion board in slot 1 or 2, remove the expansion slot cover.
b. If you are installing an expansion board in slot 3:
• Remove the PCI riser cage (" Removing the PCI riser cage " on page 31 ).