Will blown chip on the switch matrix circuit somewhere. It's all fixable
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Quoted from dementedwarlok:I do have to ask if the chip is blown, wouldn't that effect all the switches?
ah no, because its a switch matrix you will probably find just one column / row has died taking out all the switches connected to it. If you look up in your schematic all the dead switches and see if there is a pattern. This will narrow you down to which chip is damaged
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