reverb stopped working on rectoverb

[myoung2746]

Hello I have a mesa rectoverb series II combo amp. The reverb just stopped working today on the amp. Anybody ever come across this problem before? It doesnt matter where the reverb knob is positioned, no reverb comes out. Thanks,

 

[58boogie]

any chance one of the connecting wires got pulled out? (they have RCA type plugs as I remember).