Replacing A Memory Module - Lenovo ThinkCentre M800 User Manual

Replacing a memory module

Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page iii.
The following table provides information about the memory module installation rules that you should
consider when installing or removing a memory module. The "X" mark indicates the memory slots into which
the memory modules should be installed in different situations. To locate the memory module slots, see
"Parts on the system board" on page 6.
Quantity
One memory module
Two memory modules
Three memory modules
Four memory modules
To replace a memory module, do the following:
1. Remove any media from the drives and turn off all connected devices and the computer. Then,
disconnect all power cords from electrical outlets and disconnect all cables that are connected to the
computer.
2. Remove the computer cover. See "Removing the computer cover" on page 54.
3. Remove the front bezel. See "Replacing the front bezel" on page 54.
4. Remove the optical drive. See "Replacing the optical drive" on page 55.
5. Locate the memory module you want to replace. The memory modules are installed in the memory slots
on the system board. See "Parts on the system board" on page 6.
6. Press the retaining clip
same time.
Figure 47. Pivoting the drive bay assembly upward
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ThinkCentre M800 and M900 User Guide
Slot 1
X
X
1 in the direction as shown and pivot the drive bay assembly upward at the
Slot 2 Slot 3
X
X
X
X X
Slot 4
X
X
X