Introduction
If buttons are unresponsive, they may require cleaning. This guide will go through the procedure of button cleaning.
What you need
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Open the battery compartment and remove the batteries.
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Remove all of the visible screws on the outside of the case.
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Remove the 7 screws on the back side of the case, as shown in the picture.
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Remove the metal plate.
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On the back cover you will have access to the button display. Buttons can simply be grabbed and placed with your finger. Use this opportunity to clean any potentially dirty buttons or replace missing or damaged buttons.
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Clean or replace the damaged buttons as needed.
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