Introduction
Use this guide to replace the lower case on a Lenovo ThinkPad L390.
Tools
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Power off your laptop and disconnect the charger and any peripheries before beginning disassembly.
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Unscrew the nine 5 mm Phillips #00 screws that secure the lower case.
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Insert an opening tool in the gap between the lower case and the chassis.
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Pry around the entire perimeter of the lower case until it fully releases.
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Lift the lower case up and off.
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Conclusion
To reassemble your device, follow these instructions in reverse order.