FBV 3 Update Mode

The Line 6 FBV 3 has an update mode. You can use this if your firmware update fails for any reason. Press and hold down Footswitch 1 and the A footswitch and then plug in the USB cable to power on. You'll see the LCD screen say Update Mode. The Line 6 Updater will still see the FBV to allow you to run the update process again.