Lenovo T420 User Manual
12. Reinstall the battery. For more information about how to reinstall the battery, refer to “Replacing the
13. Turn the computer over again. Connect the ac power adapter and the cables to the computer.
Replacing the keyboard
Before you start, print these instructions.
You can use the following procedures to replace the keyboard with a new one, available as an option.
Prerequisites for the procedure
DANGER
During electrical storms, do not connect the cable to or disconnect it from the telephone outlet
on the wall.
on the wall.
DANGER
Electric current from power, telephone, and communication cables is hazardous. To avoid shock
hazard, disconnect the cables before opening the cover of this slot.
hazard, disconnect the cables before opening the cover of this slot.
Removing the keyboard
To remove the keyboard, do the following:
1. Turn off the computer; then disconnect the ac power adapter and all cables from the computer. Wait for
a few minutes, till the inside of the computer cools, before you start the following procedures.
2. Close the computer display, and turn the computer over.
3. Remove the battery. For more information, refer to “Replacing the battery” on page 111.
4. Loosen the screw on the memory slot cover (1), then remove the cover (2).
Chapter 6
.
Replacing devices
119