In this post I will try to show you how to replace the WLAN card in Lenovo 3000 N200 in case of failure. The process is simple and only takes a few minutes, but there are several rules to be followed.

CAUTION: Before you begin any of the following procedures, turn off the laptop , unplug the power adapter and remove the battery. Note that computer parts are very sensitive to static electricity so ground yourself before touching anything inside you computer by using grounding strap or touch a metal faucet  pipe.

As you probably know from the laptop specifications, it comes equipped with an Intel WM3945 ABG Mini PCI-E wireless card. However you can use any other card using the Mini PCI-Express interface. To access the wireless card you  should remove the lid covering the hard drive. Here you can see how to do that.

1. Disconnect the wireless antenna cables.

2. Remove the two screws securing the card to the chasis.

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3. Gently remove the card from the slot.

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4. Insert the new card at approximately 30 degree angle. Now gently press the card to the chassis, until it gets to a horizontal position.

5. Tighten the screws and connect the antenna cables .

6. You may be required to install the drivers for the new wireless card.