Question about Boss ME 70 Electric Guitar Effects Pedal Processor

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My boss ME 70 wont turn on

Hey, i've plugged my me 70 into the wall, i've plugged my guitar into the guitar input and i've plugged my amp into the MONO output. and when i try to turn everything on, nothing happens. the amp turns on but theres no lights or sound from the me 70.

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Sounds like a bad AC adapter. Companies use the brick style adapters that plug in the wall to keep noise out of the circuitry, and isolate the power by using the adapter. Chances are you have a bad one. Read the adapters' label and try to find the best match. Make sure to check the amperage rating -A- and if it is AC or DC, and the voltage. You need to have the closest rating to all of that not to damage the pedal.
If the adapter isn't the problem,the only other thought is there may be an internal fuse blown on the unit. Refer to your manual, or consult a repair service.

Posted on May 30, 2014

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Posted on Jan 02, 2017

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My Boss ME-70 han only two dots when i power on ,pedals dont lit when i press it down, is there a solution with this?


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If the changes are like increasing/decreasing GAIN/BASS/MID/TREBLE/LEVEL and also TYPE of pre-amp, then one of PREAMP potentiometer is bad.24346541-2ss5ycyvkoajtv035dpuezke-4-1.jpg

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press pedals 3 & 4 at the same time to swtich to Manual Mode. Hold down EDIT/EXIT and press the MOD pedal. Press WRITE twice.

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Usually the adapter will over ride the battery when used.
1) Make sure your 1/4" cables are working properly without the pedal "in-line".

2) Take out battery, and use just the adapter only. Make sure it is the correct and proper adapter that works with Boss. Usually the PSA-120. If you are not using a Boss Adapter, make sure yours is a direct replacement with same specifications. 9V/200mA. And "tip negative". DO NOT use Radio Shack stuff, nothing against them, but there adapters just don't mix well with Boss products and the like.

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With everything switched off. I will surmise that you are using the onboard battery with the foot pedal and not a power supply.
1. Plug lead from guitar/instrument into INPUT side of pedal
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3. Turn amplifier volume to about 10 o'clock - to stop blowing your ears out.
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Hope this helps,
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