Lenovo ThinkAgile HX1521-R User Manual page 80

– Never hold two or more DIMMs together so that they touch. Do not stack DIMMs directly on top of
each other during storage.
– Never touch the gold DIMM connector contacts or allow these contacts to touch the outside of the
DIMM connector housing.
– Handle DIMMs with care: never bend, twist, or drop a DIMM.
Before removing a DIMM:
1. Identify the failed DIMM by either checking the event logs in UEFI setup or use the Lenovo XClarity
Controller Web console to browse the post event log. The event log contains information about the
location of the DIMM fault.
2. Place the node in maintenance mode by following the procedure
Hardware Replacement Documentation.
3. Power off the node and if the cable management arm is not in place, disconnect all the cables.
4. Remove the appliance from the rack.
5. Remove the top cover.
6. Remove the air baffle.
To remove a DIMM, complete the following steps:
Figure 38. DIMM removal
Step 1. Open the retaining clips on each end of the DIMM slot.
Attention: To avoid breaking the retaining clips or damaging the DIMM slots, handle the clips
gently.
Step 2. Grasp the DIMM at both ends and carefully lift it up to remove it from the slot.
After removing a DIMM:
1. Install a DIMM filler or a new DIMM to cover the slot. See "Install a DIMM" on page 81.
2. If you are instructed to return the old DIMM, follow all packaging instructions and use any packaging
materials that are provided.
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