Lenovo E420 Laptop User Manual


 
4. Reinstall the screws 1 and 2 .
5. Attach the cover 1 , pivot it downwards, and then tighten the screws 2 .
6. Reinstall the battery. For more information about how to reinstall the battery, refer to “Replacing the
battery” on page 77.
7. Turn the computer over again. Connect the ac power adapter and cables to the computer; then turn it on.
Replacing the SIM card
Before you start, print these instructions.
Your computer may require a SIM (Subscriber Identication Module) card to establish a wireless WAN (Wide
Area Network) connections. Depending on the country of delivery, the SIM card may be already installed in
your computer or will be part of the shipping contents that came with your computer.
If you nd the SIM cards included in the shipping contents, a dummy card is installed in the SIM card
slot. Then proceed to the following instructions.
If you nd the dummy card in the shipping contents, the SIM card is already installed in the SIM card
slot, and no further installation is needed.
Chapter 6. Replacing devices 103