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

Replacing the battery, ThinkCentre Safety and Warranty Guide

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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 14. 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" on page 1. 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. The battery normally requires no charging or maintenance throughout its life; however, no battery lasts forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An error message is displayed when you turn on the computer. Refer to the "Lithium battery notice" in the ThinkCentre Safety and Warranty Guide for information about replacing and disposing of the battery. To replace the battery, 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 79. 3. Locate the battery. See "Locating parts on the system board" on page 77. Chapter 8. Replacing FRUs (Machine Types: 1852, 1853, and 1855) 87

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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 14. 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” on page 1.
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.
The battery normally requires no charging or maintenance throughout its life; however, no battery lasts
forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An
error message is displayed when you turn on the computer.
Refer to the “Lithium battery notice” in the
ThinkCentre Safety and Warranty Guide
for information about
replacing and disposing of the battery.
To replace the battery, 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 79.
3. Locate the battery. See “Locating parts on the system board” on page 77.
Chapter 8
.
Replacing FRUs (Machine Types: 1852, 1853, and 1855)
87