Yellow bypass light on MF-102

[B4SEN]

Hello!
I recently dug up my old ring mod pedal and noticed some strange things.
There is no sound in bypass mode and no bypass light. The level light is red even without input signal.
The bypass light is yellow when the effect is engaged.
Other than that it seems to work fine when engaged and sounds great.

[ashamedpop]

It sounds like the bypass switch or relay might be faulty. Since the bypass light isn’t working, but the pedal functions when engaged, the switch might not be properly toggling the signal. The yellow light when engaged suggests the LED might be wired incorrectly or the internal circuitry has an issue. Try checking the connections and solder joints around the bypass switch. If you're comfortable with electronics, a continuity test could help. Otherwise, a professional repair might be needed. Hope you get it sorted!