Lenovo ideaCentre H520e, Hardware Maintenance Manual, Page: 82 / 110

7. Position the new memory module over the memory slot. Make sure that the notch 1 on the memory
module aligns correctly with the slot key 2 on the system board. Push the memory module straight
down into the slot until the retaining clips close.
Figure 16. Installing a memory module
8. Reinstall the PCI Express x16 graphics card if you have removed it.
9. To complete the installation or replacement, go to “Completing the parts replacement” on page 90.
Replacing the optical drive
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the
User Guide . To obtain a copy of the User Guide , go to:
http://www.lenovo.com/ThinkCentreUserGuides
This section provides instructions on how to install or replace the optical drive.
Note: The optical drive is only available in some models.
To replace an optical drive, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 70.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 71.
4. Remove the three screws that secure the optical drive. Then, slide the optical drive out of the front
of the computer.
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Lenovo H520e Hardware Maintenance Manual