•If you are installing a memory module, open the retaining clips of the memory slot into which you want to install the memory module.
Figure 10. Opening the retaining clips
10.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 11. Installing a memory module
What to do next:
•To work with another piece of hardware, go to the appropriate section.
•To complete the installation or replacement, go to “Completing the parts replacement” on page 52.
Installing or replacing a PCI card
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information” in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to install or replace a PCI card. Your computer has two standard PCI card slots, one PCI Express x1 card slot, and one PCI Express x16 graphics card slot.
18ThinkCentre User Guide