JishDC800

Update! So I replaced the PCB that I just had delivered from Full Compass and everything works great now. Easy, proper, $7 fix! The only thing that needs to be done is to solder the 6 wires on. The PCB also comes with the volume/wah switch and is scored to snap off before installing. I didn't install the new switch because the old one worked fine. saracen22, I will message you to see if I can help you get a new PCB :)

Just a heads up to anyone with this problem. If you carefully read Line 6's "Warranty and Repair" section on the support page it says that most parts can be purchased through Full Compass. Sure enough, the Expression Pedal PCB for FBV3 is available for sale. I have one ordered and it will be delivered in a couple days. Line 6 50-02-0576 Expression Pedal PCB for FBV3

Just bought a used FBV3 and no matter what I try, the expression pedal will not work. I can switch from volume to wah, but sweeping the pedal has no effect. I took the bottom off and see no lights being emitted, and there is no response by shining a light. This is a huge bummer.