HP ProLiant DL320 Generation 5p User Manual page 43

Disconnect any internal or external cables connected to any existing expansion boards.
4.
Remove the PCI riser board assembly (on page 21).
5.
Remove the expansion slot cover.
6.
Install the expansion board.
7.
IMPORTANT:
properly.
Install the PCI riser board assembly (on page 22).
8.
Install the primary access panel.
9.
Install the server into the rack.
10.
The server does not power up if the PCI riser board assembly is not seated
Hardware options installation 43