Dimm Replacement - Lenovo ThinkAgile CP Part Replacement And Component Maintenance Procedures

DIMM replacement

Use the following procedures to remove and install a DIMM.
A node might be able to self-correct for certain memory errors. However, failed memory can lead to system
degradation and should be replaced quickly.
Indications of a failed DIMM are:
• A post error on boot.
• An error in the Cloud Controller interface.
• Not all memory is detected. For example, the appliance should have 256 GB per node and the host only
shows 240 GB
Remove DIMM
Use this information to remove a memory module.
Chapter 3 "Read
the
Installation
Guidelines" on
page 9
Attention: Memory modules are sensitive to static discharge and require special handling. In addition to the
standard guidelines for "Handling static-sensitive devices" on page 11:
• Always wear an electrostatic-discharge strap when removing or installing memory modules. Electrostatic-
discharge gloves can also be used.
• Never hold two or more memory modules together so that they touch. Do not stack memory modules
directly on top of each other during storage.
• Never touch the gold memory module connector contacts or allow these contacts to touch the outside of
the memory-module connector housing.
• Handle memory modules with care. Never bend, twist, or drop a memory module.
Before you remove a DIMM:
1. Identify the failed DIMM by either checking the event logs in UEFI setup or use the Cloud Controller 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.
3. Power off the node and if the cable management arm is not in place, disconnect all the cables.
4. Remove the compute node from the enclosure (see
remove_a_compute_node_from_the_chassis.html
5. Remove the compute node cover (see
compute_node_cover.html
6. Remove the air baffle (see
"Power off
the compute
node" on page
).
http://thinksystem.lenovofiles.com/help/topic/7X21/remove_the_
).
http://thinksystem.lenovofiles.com/help/topic/7X21/remove_the_air_baffle.html
http://thinksystem.lenovofiles.com/help/topic/7X21/
.
Chapter 5 Compute block maintenance procedures
"ATTENTION:
Static Sensitive Device
Ground package before
opening" on page 11
).
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