Introduction
If the WI-FI on your HP Elitebook 2740p is not working properly it may be time to replace your WI-Fi card. This guide will go through the steps to replace it.
Tools
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            Place the laptop face down in front of you. 
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            Use a Phillips #0 screwdriver to remove the three 3 mm screws from the back of the case. 
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            Remove the back panel. 
 
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            Use a Phillips #0 screwdriver to remove the two 3 mm Philips head screws from the WiFi card. 
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            Remove the card. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.