Lenovo ThinkCentre M79, Hardware Maintenance Manual

Page: 121 / 186

7. Install the new PCI card into the appropriate PCI card slot on the system board. Then, install the screw
to secure the new PCI card in place.
5
6
3
4
Figure 19. Installing a PCI card
8. If necessary, connect any cables between the PCI card and the system board. See “Locating parts on
the system board” on page 34 to identify the various connectors on the system board.
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 151.
Replacing the battery
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Read this first: 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-connector 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 coin cell battery notice” in the Safety, Warranty, and Setup Guide for information about
replacing and disposing of the battery.
To replace the battery, do the following:
1. Remove any media from the drives and turn off all attached 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 105.
3. Locate the battery. See “Locating parts on the system board” on page 34.
Chapter 11
.
Installing or replacing hardware
113