Introduction
Use this guide to remove and install a new lower case on your OLPC XO-4 Touch.
Tools
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            Pull the lock tabs towards the green outer edges of the laptop. 
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            Hold the left lock tab in the unlock position until the battery is completely removed in the next step. 
 
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            Flip the laptop over to its normal position. 
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            Lift the two antennas on both sides to unlock the screen. 
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            Open the laptop. 
 
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            Gently lift up on the back of the keyboard. 
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            Pull the keyboard up far enough to expose the ribbon cable. 
 
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            Gently lift up on the black connector to release the ribbon cable. 
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            Gently pull the blue plastic tab up and away from the black connector. 
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            Remove the keyboard from the laptop. 
 
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            Flip the laptop over, showing the top of the device. 
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            Open the laptop and rotate the screen ninety degrees. 
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            Tilt the screen so the lower right corner of the screen is closer to the lower case. 
 
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            Push in and lift up on the keyboard edge of the white handle piece. 
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            Pull the piece towards yourself to remove it from the laptop. 
 
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            Remove the four 4mm Phillips #1 screws attaching the green trim to the body of the computer. 
 
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            Unplug the cable from the mouse buttons controller to completely remove the lower frame from the device. 
 
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            Rotate the entire lower assembly up slightly, and pull it away from the screen to free it from the screen hinge. 
 
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To reassemble your device, follow these instructions in reverse order.