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Old 03-09-2019, 09:35 AM
Rich Breen Rich Breen is offline
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Join Date: Dec 1969
Location: Burbank, CA USA
Posts: 1,659
Default Re: Strange LED display

I would not use sandpaper. A very mild abrasive like a pencil eraser is a better choice to remove the oxidation, a duster to remove any eraser particles left over, then clean with isopropyl alcohol, then perhaps a contact enhancer like De-oxit.
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