Lenovo ThinkSystem DM240N, Руководство по обслуживанию, Страница: 24 / 34

Step 1. Properly ground yourself.
Step 2. Physically identify the impaired NSM module.
The system logs a warning message to the system console indicating which module is impaired.
Additionally, the attention (amber) LED on the drive shelf operator display panel and the impaired
module illuminate.
Step 3. Disconnect the cabling from the impaired NSM module:
a. Disconnect the power cord from the power supply by opening the power cord retainer, and
then unplug the power cord from the power supply. 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 on the
replacement NSM module, later in this procedure.
Step 4. 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.
Note: 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 forward 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 forward, the latching mechanism arms extend from the NSM
module and lock in their fully extended position.
Step 5. Unpack the replacement NSM module, and set it on a level surface near the impaired NSM module.
Step 6. Open the cover of the impaired NSM module and the replacement NSM module by loosening the
thumbscrew on each cover.
Note: The FRU label on the NSM module cover shows the location of the DIMMs and fans.
Step 7. Move the DIMMs from the impaired NSM module to the replacement NSM module.
a. Note the orientation of the DIMMs in the slots so that you can insert the DIMMs into the
replacement NSM module using the same orientation.
b. Eject a 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.
Attention: 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. Hold the DIMM by the corners, and then insert the DIMM squarely into a slot on the
replacement NSM module.
The notch on the bottom of the DIMM, among the pins, should line up with the tab in the slot.
When inserted correctly, the DIMM should go in easily but fit tightly in the slot. If not, reinsert
the DIMM.
d. Push down carefully, but firmly, on the top edge of the DIMM until the ejector tabs snap into
place over the notches at both ends of the DIMM.
e. Repeat substeps 7.a through 7.d for the remaining DIMMs.
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Service Guide for DM240N