The leds change when pressing the effects button through the various modes, (detune- chorus- tremelo) but the detune does not sound "detuned" anymore, and almost sounds like a very "mild" chorus effect, ( but barely) while the "CHORUS effect sounds just about the same as how the detune sounds, which is a far cry from what is should sound like! And i believe the DEPTH of the tremolo effect is not exactly what I had remembered, although there is some tremelo. Is there a board I need to replace, or a diode or transistor. If so, which board, and where would it be located? Thank You