Lenovo ThinkSystem SR850, Maintenance Manual

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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 53:
• 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 removing a memory module:
1. Read the safety information and installation guidelines (see “Safety” on page iii and “Installation
Guidelines” on page 51).
2. Turn off the server and peripheral devices and disconnect the power cords and all external cables (see
“Power off the server” on page 8).
3. If the server is installed in a rack, slide the server out on its rack slide rails to gain access to the top
cover, or remove the server from the rack.
4. Watch the procedure . A video of this procedure is available from the following links:
• https://www.youtube.com/playlist?list=PLYV5R7hVcs-B2y7oAb54mfyuLrIusa_qE
• http://list.youku.com/albumlist/show/id_50483449
5. Remove the top cover (see “Remove the top cover” on page 130).
6. If you are not replacing the memory module that you removed, see the ThinkSystem SR850 Memory
Population Reference for the required installation order of the remaining memory modules.
Complete the following steps to remove a memory module.
Watch the procedure . A video of the replacement process is available:
• Youtube: Replacing a memory module
• Youku: Replacing a memory module
Figure 74. Memory module removal
Step 1. Open the memory module connector retaining clips to extract the memory module; then, remove
the memory module.
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ThinkSystem SR850 Maintenance Manual