10.Connect the cables to the new PCI Express Mini Card. Be sure to attach the gray cable to the connector marked “MAIN” or “M” on the card, and the black cable to the connector marked “AUX” or “A.”

Note: If the new PCI Express Mini Card has three connectors, be sure to attach the gray cable to the connector marked “TR1” on the card, and the black cable to the connector marked “TR2”. If you attach either cable to the center connector, the connection speed will be lower.

11.Reinstall the keyboard. See “Replacing the keyboard” on page 130.

12.Reinstall the battery. See “Replacing the battery” on page 119.

13.Turn the computer over again. Connect the ac power adapter and cables to the computer; then turn it on.

Replacing a PCI Express Mini Card with three connectors

If your computer has a Multiple Input Multiple Output (MIMO) feature, a PCI Express Mini Card that has three connectors comes with the computer. To replace the card for the MIMO feature, do as follows:

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. See “Replacing the battery” on page 119.

4.Remove the keyboard. See “Replacing the keyboard” on page 130.

Chapter 6. Replacing devices 155

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Lenovo 42825BU, NVS-4200M, 4242X04, 42421A0 manual Replacing a PCI Express Mini Card with three connectors
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4242X04, NVS-4200M, 42421A0, 42825BU specifications

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