Hi folks -
I'm teaching a class on Lilypad Arduino and one of my student's Lilypad USB Plus was working, but now its port no longer appears under Arduino>Tools>Port when plugeds in. Meanwhile, when I plug in my Lilypad USB Plus the same way, no problem. Port shows up, can upload code, etc. etc. Leads me to believe its the Arduino and not anything computer-side.
The student says it was working in class, then they switched it off and unplugged and now the Port no longer appears. It appears to have the example Blink code running on it, as that's what's happening when plugged in. Holding the reset button stops it from blinking. Quickly double-pressing the reset button does not appear to do anything for the port showing up. I've tried restarting the Arduino IDE with it plugged in. Off vs. On, etc. but no luck.
I'm using Mac 10.14.4, Arduino 1.8.5 (to match what's in the lab), and plugging the Arduino in via the built-in USB port.
Any ideas?
Thanks so much for any help!