Lenovo ThinkCentre Edge 71, Hardware Maintenance Manual

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7. To complete the installation or replacement, go to “Completing the parts replacement” on page 139.
Installing or replacing a memory module
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the
ThinkCentre User Guide . To obtain a copy of the ThinkCentre User Guide , go to:
http://www.lenovo.com/ThinkCentreUserGuides
This section provides instructions on how to install or replace a memory module.
Your computer has two slots for installing or replacing DDR3 UDIMMs that provide up to a maximum of
8 GB system memory. When installing or replacing a memory module, use 1 GB, 2 GB, or 4 GB DDR3
UDIMMs in any combination up to a maximum of 8 GB.
To install or replace a memory module, 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 109.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 110.
4. Pivot the drive bay assembly upward to gain access to the memory slots. See “Accessing the system
board components and drives” on page 111.
5. Remove the heat sink fan duct. See “Replacing the heat sink and fan assembly” on page 127.
6. Locate the memory slots. See “Locating parts on the system board” on page 107.
7. Remove any parts that might prevent your access to the memory slots. Depending on your computer
model, you might need to remove the PCI Express x16 graphics card for easier access to the memory
slots. See “Installing or replacing a PCI card” on page 113.
8. Depending on whether you are installing or replacing a memory module, do one of the following:
• If you are replacing an old memory module, open the retaining clips and gently pull the memory
module out of the memory slot.
Figure 44. Removing a memory module
Chapter 9
.
Replacing FRUs (Machine Types: 1578, 1583, and 1652)
115