Boss e-band js8

The same thing just happened to me but without any shorting out sound. And the sound came back after I played around with turning things on and off and unplugging and plugging things in again. Not at all god during a gig. Anybody have a solution or diagnosis for this problem?

normally a buzzing sound means a grounding problem, or a component has failed, unless you have the proper equipment to check these items,, your going to have to take it to a shop that does, sorry I know thats not what you wanted to hear,, but heres a hint, Ive found that a shop that deals in instruments and sound devices charges a lot, I have found a TV repair shop in my town, that can check my band equipment,, and its much cheaper, and I usually get the stuff back much quicker too

The half-way cord is the clue. Read up on unbalanced and balanced lines and TRS connectors.
One of these requires TRS connections and the signal is being carried on the RING of the TIP-RING-SLEEVE connector. Plugging in half-way the TIP touches the ring pickup contact. The emgs one MAY use TRS type cables and there may be a reason the signal and hot of these are reversed. If I could find schematics on all this equipment I could unravel the exact cause. You could make an adapter with a Stereo 1/4 inch plug and a 1/4 inch jack by wiring it to swap the tip and ring between them to use for connecting to the emgs guitar. ALSO verify you are using the SAME type guitar cable for both.OFTEN a TRS cable will NOT turn on the electronics when plugged into a guitar. Use an unbalanced instrument cable unless you have the XLR type output. Use of an adapter from the XLR type cable into the Boss will usually not work.

Plug your guitar into the input and a cord from one or both outputs to the inputs of whatever you are using. Meant to be run in stereo for best sound. Two guitar amps?

The light means NOTHING other than a small voltage is getting to the unit. Verify the power supply is putting out the required voltage...

BUT FIRST...

A common cause of this is we forget which side is input and output... happens ALL the time, so verify you have the in and the out cables to the right placee.

Are the strings hitting the frets and making a buzzing sound or is it actually coming from the bridge? Make sure the saddles on the bridge are secure. If the buzzing is caused by the fret then adjust the bridge height and/or truss rod. If the buzzing is coming from the bridge and cannot be cured it may be worth investing in an aftermarket bridge.

Here is the schematic:http://www.godiksennet.com/images/sch/NS2.jpg Try testing or replacing Q1 first.

This sounds like a broken ground wire or trace within the unit if an IDENTICAL pedal does not act the same AT THE SAME SETTINGS.

Sometimes a circuit trace gets broken on the board inside pedals and can cause this.

Since an identical pedal doesn't have the problem, service is required.

If you know electronics you can open the pedal and look for obvious problems.

HINT: Use a bright LED penlight to "candle" the circuit board to look for cracks.

Look for broken solder joints... this can take an experienced eye to spot.

A distortion pedal NORMALLY is very simple circuitry.

First and foremost , check your signal chain. By that, i mean put the pedal aside, ...just unhook it and take it out of your signal path. Using the same cables , guitar , amp, other pedals - borrow a friends MT-2 if you can get one , and try THAT to see if THAT works , OR any other kind of distortion pedal. If another one works ok , it's YOUR MT-2. Boss pedals are pretty rugged , but sometimes the little actuator (on/off switch) underneath the treadle (where you push your foot down) will become faulty. That's a high-gain pedal - are you using a basic Strat or other single-coil pickup guitar? If so , are you playing close to any flourescent lights? SIngle coils are noisy around those lights. Will cause a hum / buzz if using a heavy dist. pedal. You can check that by moving around as you play.

Check if you may have knocked off the speaker leads OR ones to an expression pedal.