Lexicon Mx200 Reverb Delay 1u Effects Processor "turn knob broken" Questions

Screams loudly when turned on. Knobs at o, nothing connected to it. How long have you had the KB2? These are hardware problems. There may be broken solder joints, connections to ground loose / broken,

...broken solder OR worse, a crack near the control. The unit will require servicing. Parts are readily available. dirt/debris in the pot or knob will cause that crackling sound.  the pot needs to ...

broken knob on an Ibanez gio I'm buying an Ibanez Gio Guitar from a pawn shop and the bottom knob just keeps on turning, is that fixable? how much? is there a chance I can fix it myself? if you are ...

...Broken Preamp Board Replacement? I recently purchased a Fender Cyber-Twin SE at an auction for the sake of nostalgia. After getting home I turned it on, got about 5 minutes out of it until the entire ...

...knob. Turn guitar and amp volume to "10", I get nothing. Other bass works fine so its not the amp or cable. Any ideas? Broken cable inside, possibly at the output jack? Or a failed potentiometer ...

...turn on. First of all, check to make sure the fuse is good, it should be close to the power cord in the back under a small, black, screw on type knob. Sometimes, when those power switches get old, ...

...Turn the knob all the way up, and all the way down, repeatedly, until you feel the knob get nice and loose and there is no tension. It should take a quick 10-12 turns back and forth to get it clean. ...

...to encoder through an opening so the spray gets inside will help clean contacts.  If the knob itself is hard to turn, the shaft is likely bent, and there may be damage to the encoder

...knob - effects returns - only different effect than I was using. or - if I unplug the guitar cord and plug it back in effects returns. or I turn amp off then on - effects return but they drop out ...