Lenovo ThinkPad T420si (English) User Guide - Page 126

Replacing the PCI Express Mini Card for wireless LAN/WiMAX conne

Page 126 highlights

10. Reinstall the battery. For more information about how to reinstall the battery, refer to the instructions in "Replacing the battery" on page 97. 11. Turn the computer over again. Connect the ac power adapter and cables to the computer; then turn it on. Replacing the PCI Express Mini Card for wireless LAN/WiMAX connection Before you start, print these instructions. Prerequisites for the procedure DANGER During electrical storms, do not connect the cable to or disconnect it from the telephone outlet 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. Attention: Before you start installing a PCI Express Mini Card, touch a metal table or a grounded metal object. This action reduces any static electricity from your body. The static electricity could damage the card. Replacement instructions Your computer has a PCI Express Mini Card slot for connection to a wireless LAN/WiMAX. To replace the PCI Express Mini Card with a new one, follow the procedures below. Replacing a PCI Express Mini Card with two connectors 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 about removing the battery, refer to "Replacing the battery" on page 97. 110 User Guide

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10. Reinstall the battery. For more information about how to reinstall the battery, refer to the instructions in
“Replacing the battery” on page 97.
11. Turn the computer over again. Connect the ac power adapter and cables to the computer; then turn it on.
Replacing the PCI Express Mini Card for wireless LAN/WiMAX
connection
Before you start, print these instructions.
Prerequisites for the procedure
DANGER
During electrical storms, do not connect the cable to or disconnect it from the telephone outlet
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.
Attention:
Before you start installing a PCI Express Mini Card, touch a metal table or a grounded metal
object. This action reduces any static electricity from your body. The static electricity could damage the card.
Replacement instructions
Your computer has a PCI Express Mini Card slot for connection to a wireless LAN/WiMAX. To replace the
PCI Express Mini Card with a new one, follow the procedures below.
Replacing a PCI Express Mini Card with two connectors
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 about removing the battery, refer to “Replacing the battery”
on page 97.
110
User Guide