Installing Or Replacing The Wi-Fi Card Module - Lenovo ThinkCentre M53 User Manual

4. Remove the old coin-cell battery.
Figure 53. Removing the old coin-cell battery
5. Install a new coin-cell battery.
Figure 54. Installing a new coin-cell battery
6. Reinstall the hard disk drive assembly. See "Replacing the hard disk drive assembly" on page 100.
7. Reinstall the computer cover and connect the cables. See "Completing the parts replacement" on
page 109.
Note: When the computer is turned on for the first time after replacing the coin-cell battery, an error
message might be displayed. This is normal after replacing the coin-cell battery.
8. Turn on the computer and all attached devices.
9. Use the Setup Utility program to set the date, time, and any passwords. See "Using the Setup Utility
program" on page 33.

Installing or replacing the Wi-Fi card module

Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page v.
Note: The Wi-Fi card module is only available in some models.
To install or replace the Wi-Fi card module, do the following:
1. Remove all 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 89.
3. Remove the hard disk drive assembly. See "Replacing the hard disk drive assembly" on page 100.
4. Locate the Mini PCI Express card slot. See "Locating parts on the system board" on page 6.
.
Chapter 9 Installing or replacing hardware
103