Introduction
If your camera's function keys are nonresponsive, you may need to replace the function key motherboard. After removing the back cover and the LCD screen, you will be able to replace the function key motherboard yourself.
Tools
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Turn off the camera.
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Turn the camera upside-down and press the tab to release the battery cover. Remove the batteries.
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Turn the camera upside down to view the "Card/Batt. Open" Cover.
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Use a Phillips head #000 screwdriver to remove the three (3) 4.0 mm screws.
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Open "Card/Batt. Open" Cover.
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Remove the one (1) 5.0 mm screw with the Phillips head #000 screwdriver.
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Turn the camera to the right side of the LCD screen.
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Remove the three (3) 4.0 mm screws with the Phillips head #000 screwdriver.
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Gently remove the back cover.
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Start at the bottom at the corner of the "Card/Batt. Open" Cover.
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Then move onto the other edges and the top.
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Turn the camera to view the back.
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Remove the one (1) 3.0 mm screw on the top right corner of the screen.
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Lift the LCD Screen off of the back to view the attached ribbon cables.
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Use tweezers to flip the black bar up.
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To reassemble your device, follow these instructions in reverse order.