IBM Power Systems 9009-41A Manual page 19

DANGER: Multiple power cords. The product might be equipped with multiple AC power cords
or multiple DC power cables. To remove all hazardous voltages, disconnect all power cords
and power cables. (L003)
10. Unseat each of the power supplies by pushing on the locking-tab and pulling the power supply out
enough so that the connector is disengaged.
11. Label, disconnect, and set aside all remaining rear cables that connect to the system.
12. Close the cable management arm by completing the following steps:
a) Swing the cable management arm towards the server.
b) Insert the inner cable management arm tab (A) into the outer mounting bracket (B) until it clicks
into place as shown. The inner mounting bracket (C) is not used on the left side.
Removing and replacing the system backplane in the 9009-41A, 9009-42A, or 9223-42H 5