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If you need to replace the Wi-Fi chip within your Dell latitude 7390, follow this guide.
Before beginning this repair, be sure to power off your laptop and disconnect from the power adapter.
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Orient your Dell Latitude 7390 laptop so that it is facing towards you as if you're going to open it.
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Flip your laptop over so that the bottom is facing up.
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Using your Phillips #1 screwdriver, remove the eight 6 mm screws around the border of the bottom panel.
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Using an opening tool or picks, work your way around the periphery and pry the back case off.
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Finally, lift the back panel off to uncover the inside of your Dell Latitude 7390.
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Use the Phillips #1 screwdriver to remove the five 6 mm screws holding the battery in place along the edges of the battery.
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Pull the black tab on the top of the connector to unplug the battery from the motherboard.
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Carefully lift the battery out of the laptop.
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Using a Phillips #1 screwdriver, remove the 3 mm screw securing the Wi-Fi card.
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Detach the coaxial connectors from the Wi-Fi card with tweezers.
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After the wires have been disconnected, pull the chip out of the connector and place the part aside.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.