mrstan

Might try to flash back to factory if all else fails.. Mine did same thing and flashing brought back to life. Some setting evidently got messed up and left with no output. software.. Gotta love it!

Might look in windows hardware list and delete it from there and then re-plug in the cable to see if it recognizes the unit from scratch. The driver might be messed up in Windows for the USB device. This happens all the time for my printers and stuff that is USB like that... - Unplug your XT - Delete the XT USB driver from the list of devices in Windows - Reinstall your driver / software for the XT - Reboot your computer - Plug in your XT and let Windows find it from scratch, ad pay attention to the messages that will pop-up.