My 10 year old F1-X now randomly loses gain abruptly - goes to about 1/2 volume level.It seems to be some sort of mechanical connection - if I bang on the unit or crank up the volume knob and hit a string to 'jar' the rig, it pops back to normal operation. I have cleaned all the 1/4 in jacks, but not touched the PCB or anything inside - yet.
Any ideas from factory or users out there to point me to a known weak spot? I love this unit but it is killing me on stage now, and it is bordering on 'unreliable'. HELP!