Power supplies do not have a power switch.
b. Disconnect the storage cabling from the NSM module ports.
Make a note of the NSM module ports that each cable is connected to. You reconnect the cables to the
same ports when you reinsert the NSM module, later in this procedure.
3. Remove the NSM module from the shelf:
a. Loop your index fingers through the finger holes of the latching mechanisms on either side of the NSM
module.
If you are removing the bottom NSM module, and if the bottom rail is obstructing access
to the latching mechanisms, place your index fingers through the finger holes from the
inside (by crossing your arms).
b. With your thumbs, press down and hold the orange tabs on top of the latching mechanisms.
The latching mechanisms raise, clearing the latching pins on the shelf.
c. Gently pull until the NSM module is about one third of the way out of the shelf, grasp the NSM module
sides with both hands to support its weight, and then place it on a flat stable surface.
When you begin pulling, the latching mechanism arms extend from the NSM module and lock in their
fully extended position.
4. Loosen the NSM module cover thumb screw and open the cover.
The FRU label on the NSM module cover shows the location of the four DIMMs, two on either side of the
heat sink, in the center of the NSM module.
5. Physically identify the faulty DIMM.
When a DIMM is faulty, the system logs a warning message to the system console indicating which DIMM
is faulty. Additionally, the DIMM attention (amber) LED, located on the board next to the DIMM slot,
illuminates.
The LED for the faulty DIMM remains illuminated for 10 minutes after you remove the NSM
module from the shelf.
6. Replace the faulty DIMM:
a. Note the orientation of the DIMM in the slot so that you can insert the replacement DIMM using the
same orientation.
b. Eject the DIMM from its slot by slowly pushing apart the ejector tabs at both ends of the DIMM slot, and
then lift the DIMM out of the slot.
Carefully hold the DIMM by the corners or edges to avoid pressure on the DIMM circuit
board components.
The ejector tabs remain in the open position.
c. Remove the replacement DIMM from its antistatic shipping bag.
d. Hold the DIMM by the corners, and then insert the DIMM squarely into a slot.
1519
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