Haya Me again, After spending 2 and a half ours of probing, there was a bead of solder about the size of a hair and 3mm long bridgeing one of the multiplexeers pins to a pass through which was very close to it. After snapping the bead off, ureka! (...) (25 years ago, 11-Mar-00, to lugnet.robotics.handyboard)
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