Introduction
Use this guide to replace or upgrade the RAM modules in your Lenovo ThinkPad T580.
Tools
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            Slide the switch on the right side of the battery to the right while applying upward pressure on the battery. 
 
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            Using a Phillips #00 screwdriver, unscrew the eight 3.3 mm captive screws on the bottom of the laptop. 
 
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            Run a Jimmy along the crease of the computer all the way around, twisting it periodically to disengage the clips. 
 
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            Remove the RAM module from the laptop. 
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            Repeat the same process for the second RAM module if your computer included one. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.