I have a Boss EH-2 which is permanently switched on. I suspected the problem was with the switch, but I checked it with the continuity tester on my multimeter and it seems fine (contact is made when the switch is engaged, broken when the switch is released). I also tried jumping the two contacts on ...

Thanks Dirk. I don't have an oscilloscope, is there anything I can check with a multimeter or an audio probe?

Thanks; is it possible to check these while they are still in the circuit?

I bought a Boss DD-5 with a couple of other faulty pedals. The other two are back to life, but I'm struggling with the DD-5. The pedal only passes a clean, unaffected signal. The LED is always lit, but the effect does not come on when you press the footswitch. This is the same with battery power or ...