11. Check the position of the voltage-selection switch on the rear of the computer.
Use a ballpoint pen to slide the switch, if necessary.
Note: Some computers do not have a voltage switch. These computers
automatically control the voltage.
v If the voltage supply range is 100–127 V ac, set the switch to 115 V.
v If the voltage supply range is 200–240 V ac, set the switch to 230 V.
12. Reconnect all the power supply cables to the drives and the system board.
13. Go to Chapter 4, “Completing the parts replacement,” on page 39.
Replacing the heat sink
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 instructions on how to replace the heat sink.
To replace the heat sink:
1. Open the computer cover. See “Opening the cover” on page 12.
2. Pivot the drive-bay assembly upward to gain access to the heat sink. See