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Memory modules removal and installation - ThinkPad Edge E420

For access, remove this FRUs in order:

e420_memory_modules_1

Note:If only one memory module is used on the computer you are servicing, the card must be installed in SLOT-0([a]:lower slot), but not in SLOT-1 ([b]:upper slot).

e420_memory_modules_2

When installing: Insert the notched end of the memory module into the socket. Press the memory module 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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