So, I have only used my Variax with the HD500, until yesterday. I didn't have the HD500 available, so I plugged the guitar into a normal (Fender) amp. I pulled the guitar model knob out, it lit up, as it should on a fully-charged battery, but for some reason I didn't get any of the guitar models. I switched to Chime, but didn't get the 12 string, switched to resonator but only go the sound of the nomal magnetic pickups. The only thing that seems to work is the magentic picks and the 5 way tone switch. Is it possible I have a defective guitar? I bought it 6 months ago, and never even bothered to try this guitar outside of using the HD500 hardware.