4. Install the new battery.

5. Replace the computer cover, and connect the cables. See Chapter 4,
“Completing the parts replacement,” on page 47.

Note: When the computer is turned on for the first time after battery

replacement, an error message might be displayed. This is normal after
replacing the battery.
6. Turn on the computer and all attached devices.
7. Use the Setup Utility program to set the date and time and any passwords. See

"Using the Setup Utility" in the User Guide.

Replacing the power supply assembly
Attention
Do not open your computer or attempt any repair before reading the “Important safety
information” in the Safety and Warranty Guide that was included with your computer. To
obtain a copy of the Safety and Warranty Guide, go to the Support Web site at
http://www.lenovo.com/support.
This section provides instruction on how to replace the power supply assembly.
1. Remove the computer cover. See “Removing the cover” on page 12.

Note: For this procedure, it helps to lay the computer on its side.

2. Disconnect the power supply cables from the system board and from all
drives. See “Identifying parts on the system board” on page 9.

Figure 18. Battery installation

Chapter 3. Installing options and replacing hardware 25