HP ProLiant DL120 G5 Server - Manual (Page 26)

Hardware options installation 26
2. Remove the server from the rack (on page 6 ).
3. Remove the primary access panel (on page 7 ).
4. Disconnect any internal cables connected to any existing expansion boards.
5. Remove the PCI riser board assembly (on page 7 ).
6. Remove any installed expansion boards.
7. Remove the PCIe riser board from the assembly.