Master Volume Desn't Work

  • So I have a Kemper rackmount Powerhead and all of a sudden I can't get the master volume knob to raise the volume. When I turn the knob the screen shows "main volume" is increasing but the "Power Amp" stays flat and I don't get an increase in volume. The "Rig volume" knob does increase slightly when adjusted. I have downloaded the newest firmware update with no success. I have tried different cabs and speaker cables with no success.

    I'm hoping this is a simple user error since I am very new to the Kemper. Any help would be appreciated as I have a gig tomorrow!