After many hours successfully using my Boron device it now seems to not want to connect to my laptop for flashing. When I insert the micro usb the LEDs come on and flash for maybe 1 second, then go dark. Sometimes if I hold it just right it will stay on longer, but then when FLASHING gets to 43% it goes dark. Works in all other respects but I suspect something mechanical is happening…are others seeing any kind of mechanical/electric problem with the connector? I know I have probably inserted/unplugged dozens of times during my development/testing phase but I’ve never seen this type of failure and am careful not to stress too much. Thanks!
That is not expected behavior. I assume you have tried this, but just in case: Have you tried a different micro USB cable in case the problem is in the cable and not the connector on the Boron?
It would be rare for the micro USB connector on the Boron to fail that way. If it fails, it's usually because it broke off.