Replacing A Memory Module - Lenovo 10140/90AC Maintenance Manual

Step 4. Remove the two screws that secure the computer cover at the rear of the chassis.
Step 5. Slide the computer cover out to remove it.
Step 6. To reattach the computer cover:
a. Line up the computer cover with the chassis and slide it back into position.
b. Secure the computer cover to the chassis with the two screws.

Replacing a memory module

Note: For this procedure, it helps to lay the computer flat.
To replace an optical drive:
Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to "Left and right view"
and "Rear view" for help with locating the various connectors.
Step 4. Remove the computer cover. Refer to "Removing the computer cover".
Step 5. Locate the memory module connectors. Refer to "Locating components".
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Lenovo Erazer X510Hardware Maintenance Manual