Lenovo ThinkPad R500 2716 User Manual page 58

6. If the two SO-DIMMs are already installed in the memory slots, remove
7. Find the notch on the contact edge of the SO-DIMM.
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ThinkPad R500 Service and Troubleshooting Guide
c. If your model has a touch pad or a fingerprint reader, detach the
connector of the palm rest cable by pulling the tab with your fingers.
Now the palm rest has been removed.
an SO-DIMM to make room for the new one by pressing out on the
latches on both edges of the socket at the same time. Be sure to save it
for future use.
Attention: To avoid damaging the SO-DIMM, do not touch its contact
edge.