Despite the social media moderation drama -- which I've seen in different contexts for decades so seeing it here isn't a surprise -- the advice actually offered on these threads for this issue was USEFUL and helped to solve the problem. The original measurement advice worked, and was verified by getting permission to crack the case to get at the PCB. And yes, it turns out to be a USB port, with "non-standard" pin ordering. And for that excellent technical advice I thank the readership, and as a long-time forum designer and moderator myself, I offer the free advice of trying to turn down the moderation emotional volume a bit whenever possible. Yes, big forums take a lot of work to manage, but we're all in this together, one way or another. Of course, as Allen Sherman sang, free advice is worth the price. In any case, my thanks.