Lenovo ThinkCentre Edge 91 Hardware Maintenance Manual (HMM) (April 2012) - Th - Page 123

• 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 47. Opening the retaining clips 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 48. 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 104 Replacing the battery 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 Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel-port assignments (configuration). A battery keeps this information active when you turn off the computer. Chapter 9. Replacing FRUs (Machine Types: 1857, 1893, and 1895) 119