I bought my XT LIVE approximately 6 months ago. The unit currently has approximately 50 hours of use. Approximately 2 weeks ago the gain was dropping from approximately 45% down to zero resulting in a huge drop in volume and tone. I tried turning my gain back up but the gain would not respond. I have the same problem with all banks including the factory pre-set banks. I encounter the same problem everytime I use the unit. I believe that the electronics controlling the gain knob are faulty and the unit is in dire need of repairs. This really bums me out because of the price I paid for the unit and because of the way I have babied this unit. Any ideas or solutions?
Sorry to hear about the issues you are having.
Have you tried connecting the pedal to a computer and reflashing the POD XT Live?
Follow the instructions at the bottom of this page:
Line 6 Customer Support