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Merlin · 23 March 2010, 11:39

Touch up the graphite pads with a soft pencil then brush off the excess dust. I used to repair a lot of older calculators with membrane keyboards using pencil graphite.

23 March 2010, 11:39	#10
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	Touch up the graphite pads with a soft pencil then brush off the excess dust. I used to repair a lot of older calculators with membrane keyboards using pencil graphite.