Voyager Modulation Busses problems

Hi guys,

I own a Voyager select series from 2013 and I’m suffering from following issue:

Sometimes when I switch on the device the mod wheel shows no influence to the modulation buss. Only pedal/on shows some signal processing.

After several times of switching on and off both mod busses function proper. So but after some time mod wheel buss looses functionality again randomly.

I made a reset to all settings an checked if the mod wheel is broken but the encoder works fine.

So I have no idea what the real reason is and switching on and off is no proper solution.

I heard something about some fault ICS in that production time…

It would be very helpful If anyone have an idea and maybe a solution for that. Thanks in advance!

BR
Andreas