I haven't used my Pearl AD-33 two channel analoge delay pedal for quite some time, but I got some feeling today and plugged it in. I was really disappointed to realize that something has happened to it since last time. First off, no sound when bypassed. When engaged, the effect LED flickers like crazy, and ocationally goes out completely. The channel select LED works fine. The pedal spews out this loud buzz, kinda like a waterfull, but the signal comes through, albeit weakly. No delay at all at channel one, but channel 2 is working, although with the noise remaining. Any suggestions for where I should start trouble shooting?