Lenovo ThinkPad T410i Hardware Maintenance Manual page 85

Removal steps of DIMM (in the slot under the keyboard)
When installing: Insert the notched end of the DIMM into the socket. Press the DIMM firmly, and pivot it
until it snaps into place. Make sure that it is firmly fixed in the slot and does not move easily.
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Chapter 8 Removing and replacing a FRU
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