HP ProLiant DL560 Server - Manual (Page 73)

Hardware Options Installation 73
Redundant Hot-Plug AC Power Supply Option
CAUTION: To prevent improper cooling and thermal damage,
do not operate the server unless all bays are populated with either a
component or a blank.
1. Unlock the hinge on the cable management arm and swing the arm away
from the server.
2. Remove the power supply blank.
HP CONFIDENTIAL
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