2. Reinstall the screw and tighten it.

3.Reinstall the battery. See “Replacing the battery” on page 67.

4.Turn the computer over again. Connect the ac power adapter and all cables.

Replacing a wireless LAN card

Before you start, print these instructions.

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 wireless LAN 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.

To replace the wireless LAN card, do the following:

1.Turn off the computer; then disconnect the ac power adapter and all cables from the computer. Wait three to five minutes to let the computer cool.

2.Close the computer display, and turn the computer over.

3.Remove the battery. See “Replacing the battery” on page 67.

Chapter 6. Replacing devices 89

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Lenovo E531, E431 manual Replacing a wireless LAN card