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sticky number button ?

my er 4915 was wiped down and now the 1 button won't work, can it be removed and cleaned under?
RAYE, April 2014
You have to do it from the bottom of the keyboard. The screws will need to be removed and the internal membrane extracted and cleaned/ dried.

Registerman, April 2014
link Click here to see other fixes for Sharp ER-4915.