Hi guys. Recently my SWR Goliath Jr. III just stopped making noise from the tweeter. My beloved treble is gone! I opened her up to check things out....there's a fuse in there, that wasn't blown. And the tweeter wasn't farting or rattling, so I don't think it's blown. And all the connections look fine. What could it be? The attenuator on the back does nothing. I need my treble back!