This strange thing happened to me today, i plugged my hd400 and after booting i noticed that the presets triggers ABCD weren,t working, not even the green lights, the mode switch neither, all the other buttons were functional, i can change amps, effects, tweaks, i can even change banks number, but cannot select any of the letters in the selected bank number. Please help, is this a firmware issue or a hardware problem¿¿¿