Introduction
The keyboard mat is what makes contacts with the motherboard. If the keys are not working very well then the mat may need replacing.
What you need
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Remove the battery cover.
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Remove the AAA batteries from the calculator.
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Remove the 5mm Philips #00 screw holding backup battery cover.
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Remove the backup battery cover.
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Use plastic opening tool to remove the backup battery. Place the tool in the small cut-out next to the battery and pry the battery out.
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Unscrew the six 7.5mm T6 screws on the back case. You will need to use a screwdriver with a long and skinny head.
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Pry back case off. Insert the plastic opening tool in the track for the protective cover and pry the halves of the case apart.
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Remove the eight (8) 5mm Philips #00 screws on the motherboard.
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Carefully remove the motherboard and screen. Grab the board by its side with one hand and the screen with the other. Carefully lift the two parts up.
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To reassemble your device, follow these instructions in reverse order.
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Team
Cal Poly, Team 18-37, Regan Fall 2012 Member of Cal Poly, Team 18-37, Regan Fall 2012
CPSU-REGAN-F12S18G37
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