HP ProLiant ML100 Series User Manual page 43

Remove the expansion slot cover retainer.
4.
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.
Remove the expansion slot cover.
5.
IMPORTANT:
installing a board.
It may be necessary to remove the slot cover next to the slot in which you are
Hardware options installation 43