Introduction
I will be showing you how to remove, and replace the WiFi card in your Dell latitude E6400. The entire process shouldn't take more than 10 minutes, as only 2 screws need to be removed to remove the card.
Tools
Parts
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            Simultaneously slide the battery latches (outlined by the red box) to the dock connector in the middle. 
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            This will release the battery. Just slide the battery away from the computer. 
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            Open up the computer and press and hold the power button for 5 seconds. This drains any power left inside the computer. 
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            This is important, as if electricity remains in the notebook, it can shock you and damage the logic board. 
 
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            Loosen the center screw with a philips screw driver. This is the only screw that needs to be loosened. 
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            It can't be removed as it is captive the the bottom plate. 
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            Now slide the plate away from the dock connector. 
 
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            Use a plastic opening tool or a spudger to remove the antennas. 
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            I use my fingers, but the picture shows and iPod opening tool because most adults have bigger fingers. 
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            I'm 14, so my fingers are small enough. 
 
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            The card should instantly pop to an angle less than 45 degrees once the screw is removed. 
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            Now simply pull the card strait away from the slot. 
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            Install a new card by sliding it in the direction of the arrow and pressing firmly down until it clicks. 
 
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            Slide the bottom plate on. 
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            Slide it to the rear of the notebook. (battery compartment) 
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            Tighten the screw. 
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            Do not over-tighten. Doing so will strip the screw. 
 
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To reassemble your device, follow these instructions in reverse order.
One comment
Why is your soundcloud linked as the wifi card site. It is really not appropriate considering how great of a job you did with the instructions for this repair.