HP ProLiant BL420c User Manual page 25

Remove the server blade (on page 13).
3.
Remove the access panel (on page 14).
4.
Disconnect the capacitor pack cabling, if connected
5.
Remove the SAS controller (on page 14).
6.
Remove the heatsink blank. Retain the heatsink blank for future use.
7.
Open each of the processor locking levers in the order indicated, and then open the processor retaining
8.
bracket.
("FBWC capacitor pack
Hardware options installation 25
cabling" on page 46).