ThinkPad L412 WLAN Card Replacement

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Turn the laptop over.

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Remove the battery, and make sure the device has no power.

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Then, with a J00 screwdriver, loosen the screws. Make sure the screws don't fall out!

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Then, use the opening tool to carefully open the lid (your fingernail can also work too).

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Next, unscrew the two screws. Then, carefully use tweezers to remove the two cables from the connectors.

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Now, remove the WLAN card.

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Next, install the new card, re-attach the cables to the connectors, and screw the two screws back into place.

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Then, carefully set the lid back into place and screw the screws back in. Now, finally insert the battery and lock it back into place.