Effects Loop Problem

[MesaEMG29]

Hey guys. Just recently started having this problem with my effects loop on my Dual Rectifier 3 channel. My effects are all sent through the send and return loop. I have my effects automatically set to only engage when i run my clean channel 1, which means it should not be engaged when i am running my Channel 2 or channel 3, unless i manually engage them with the FX on my footswitch. Just recently my effects loop has started engaging on all three of my channels no matter what, even though my loop is set to channel 1, and the FX on my footswitch is off.

 

[mikey383]

I remember having a similar problem with my 3 channel Triple. I ended up taking the chassis out of the shell and noticed the plug on the back of the FX selector switch had worked its way unplugged. Might give that a try.