Footswitches were replaced on the following buttons: A, B, C, MODE. Since then, things started behaving weird: - button "A" is basically duplicating the "Save" button - the "TAP" button is very flaky and, when works, duplicates the "D" button - the "D" button now shares its role with the "TAP" button i.e. one can turn on the tuner with it All the other buttons behave the same as before. Also, the LEDs above "A" and "TAP" are always lit on with green, and the LED above "D" button is always pulsating red. The digital display only displays last two digits. It looks like the buttons are supplied with wrong voltage and as a result, POD gets confused. I've measured the voltage (the multimeter was set to 20V DC):
I've also got advise from an electronics repair guy, he said that we can't do much without the schematics (which is, of course, nowhere to be found). P.S. i live far away from service centers so just sending the POD to repairs isn't an option.