Somewhere along the line Atmel Studio stopped talking to my XMEGA A1U Xplained Pro.
It's partly alive:
- When I unplug its USB cable, Windows makes the "dee-doh" sound, and when I plug it in, it goes "doh-dee".
- The power light is on.
- The yellow LED is on. When I hold the reset button, it goes off.
- Neither `mode` nor my favorite terminal emulator (CoolTerm) find the XMEGA on a COM port.
AtmelMicrochip Studio project that previously worked doesn't recognize the device (i.e. doesn't show up under Tool)
Any suggestions for further diagnosis or -- even better -- resurrection?