Noticed one of my dual-tone patches sounded off.  Turned out Tone 2 was completely silent.  Looking further, I found the same in every patch - can't get Tone 2 on any of them.  Even reinitialized the presets to factory - didn't help.  Tone 2 is not locked on any patch -  the little padlock icon on the home screen is open on all patches.  Outputs page shows tone 2 NOT muted.  Inputs page shows tone 2 input same as tone 1 (Guitar + VX1).  Both tones are panned dead center, so it's not a cable problem.  Standard electric guitar, not Variax.  Running in stereo from 1/4" outputs to a full-range amplifier.  No idea how to fix this.  Help please!