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Figure 14. Removing the old battery
5. Install a new battery.
Figure 15. Installing a new battery
6. Reconnect all the cables to the system board and close the computer cover. See “Completing the
parts replacement” on page 25.
Note: When the computer is turned on for the rst time after battery replacement, an error message
might be displayed. This is normal after replacing the battery.
7. Turn on the computer and all attached devices.
8. Use the Setup Utility program to set the date, time, and any passwords. See Chapter 4 “Using the Setup
Utility program” on page 35
.
Replacing the heat sink
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre
Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the heat sink.
CAUTION:
The heat sink might be very hot. Turn off the computer and wait three to ve minutes to
let the computer cool before opening the computer cover.
To replace the heat sink, 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. Open the computer cover. See “Opening the computer cover” on page 12.
3. Locate the heat sink. See “Locating components” on page 8.
4. Remove the four screws that secure the heat sink to the system board.
18 ThinkCentre User Guide