Finally fixed my IIe keyboard issue. Working from the assumption that the keyboard itself was good, I found a signal on the Y4 scan that was consistent with it bridging to something. But that pin runs straight to the kbd connector! So I traced it on the board and discovered that it also ran to a pin on the keypad connector. Which looked a little messy, so I desoldered it to find... this.

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Cleaned out the gunk with some isopropyl and we're back in business. Wonder if anyone has ever seen an Apple II keypad on the wild...

@phooky I think I saw one at a trade show my grandfather took me to for fun circa 1984, but that could be a false memory. I had basically the right thing in mind when I looked up what they looked like just now, but everything looked kind of like that at the time, so that doesn't necessarily mean anything.

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