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My vintage calculator collection has a display problem on the oldest one
I collect old calculators and the LED display on my 1970s model is dim. I've replaced the batteries and checked connections. Any tips for brightening these aging displays?
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the_ray2d ago
Do you think the LED chips are just worn out from age? The materials inside can break down after decades, which slowly dims the light. You might try gently cleaning the display contacts with isopropyl alcohol, but that often only helps a little. For a real fix, finding a donor unit for parts is sometimes the only way.
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