IBM 9009-41A Manual page 19

1) Release the mounting bracket from the cable management arm assembly by pressing the
indentation (A) on the inner cable management arm tab. The cable management arm releases
from the outer mounting bracket in the direction shown.
Figure 3. Releasing the mounting bracket
2) Swing the cable management arm away from the system.
In the image, the inner cable management arm tab is shown on the left side as you are facing
the system from the rear. However, the cable management arm can also be installed so that
the inner cable management arm tab is on the right side of the system.
CAUTION: To avoid causing damage to the arm, open the cable management arm just
long enough to complete these repairs.
c) Physically verify that the slot you identified is where you want to install the adapter.
• Use the blue identify LED on the enclosure to locate the system. Ensure that the serial number
of the system matches the serial number to be serviced.
• Look for a flashing amber LED, which identifies the unoccupied slot that was selected by using
the identify function.
d) Stop the system. For instructions, see Stopping a system (www.ibm.com/support/
knowledgecenter/POWER9/p9haj/crustopsys.htm).
8. If you powered the system off, complete the following steps:
a) Label and disconnect the power cords from the system unit.
Installing, removing, and replacing PCIe adapters for the 9009-41A, 9009-42A, and 9223-42H system 5