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Memory removal and installation - ThinkCentre A50, A51, A52, M52, S50, S51
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Attention: Do not open your computer or attempt any repair before reading the "Important safety information". You can also find this information in the Quick Reference Guide that was included with your computer or in the Hardware Maintenance Manual (HMM) for the computer.

For ThinkCentre A52 (type 8155, 8156, 8157, 8158, 8159, 8160) and M52 (type 8099, 8116, 8215, 9210, 9211) systems:

Quick Reference Guide
Hardware Maintenance Manual

For ThinkCentre A52 (type 8289, 8298, 8328, 8341, 8344, 8382) systems:

Quick Reference Guide
Hardware Maintenance Manual


Replacing the memory module
  1. Open the computer cover. See Opening the cover.
  2. While holding the rear of the computer chassis down, pull upward on the handle provided to remove the PCI riser assembly and any adapters that are currently installed.

Removing PCI riser card

  1. Pivot the drive bay assembly upward to gain access to the memory module.

Pivoting drive bay assembly

  1. Locate the memory connectors.
    • For ThinkCentre A52 (type 8155, 8156, 8157, 8158, 8159, 8160) and M52 (type 8099, 8116, 8215, 9210, 9211) systems, see "System board diagram".
    • For ThinkCentre A52 (type 8289, 8298, 8328, 8341, 8344, 8382) systems, see "System board diagram".
  2. Remove the memory module being replaced by opening the retaining clips as shown.

Removing memory

  1. Position the replacement memory module over the memory connector. Make sure the notch 1 on the memory module aligns correctly with the connector key 2 on the system board. Push the memory module straight down into the connector until the retaining clips close.

Installing memory

  1. Reinstall the PCI riser assembly and adapters.
  2. Go to "Completing the parts replacement".
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If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Country Availability
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Document ID : PD013501
Legacy Document ID : MIGR-60473
Last Updated :
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