Turned on by B200 keyboard and when I pressed a note it started making a high pitch noise with a lot of re-verb. Then it stopped making any sound at all. Not even when using headphones.

When you turn on your keyboard it carries out a self check to make sure all is OK, if not the start up procedure stops

It could be a fault on the mainboard, the rubber switched do wear but as the light is coming on it would indicate this is working

Try a master reset : whilst switched off, hold down the highest note (Top C) and whilst holding down turn on, after a few seconds if this is successful then the display will show up, this function resets to factory setup

If this fails you will need to investigae board connections etc inside the keyboard

Good luck

My guess is the power socket has failed, a very common fault.
To test my theory plug in the keyboard and turn on without pressing any notes. Move the plug where you plug it into the back of the keyboard from side to side and see if the power turns off. If it does you need to replace the the input socket and probably reinforce the solder tracks on the PCB as they often break. If you can solder the part can be found here or take to a local repairer who should be able to sort it out quickly for you.


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Hi, This and a lot of similar keyboards have gold flashed pads on the PCB and the keys press one or two rubber caps, with conductive pads in them, down.
Clean the pads with isopropanol, (and nothing else) and it will be cured 99% of the time. If a few notes do not work, especially after heavy use, then the rubber caps can be replaced.
Taking the keyboard apart is long winded because of the number of screws involved.
The job its self is simple enough, but take note of the order things go in and where the screws go.
Hope this helps, Chris.

To lower the action on an acoustic guitar:

Usually just the saddle needs reducing.

1. Remove strings (or you may be able to just loosen them). Remove saddle, sand down the bottom a little at a time. Restring and check action.

The action can be set as low as poss without any fret buzzing or note choking on all strings and on all frets.

2. Repeat 1

If the action remains too high then there are other techniques.

Later ...

First select the A-08 to A-23 by pressing the MODE button. Then press the up/down button to select something in the A-08 to A-23 range. Now press the MODE button again until P-xx shows where xx are digits. Use the UP/DOWN button to select the speed. When the display shows P-So then it is in sound mode. Note the comments that high pitched or relatively quiet sounds will not be recognized.

The name for the notes that don't stop playing is "Dreaded MIDI Drone". It is caused by multiple note on commands and lost "mating" note off commands.

Also read "c." on page 80 regarding buffer length and "choppy" sounds.

This would indicate a problem with the scanning matrix for the keys. I don't have my schematics handy right now, to analyze which part might be bad...

FIRST though, check the settings for the keyboard splits on the utility page that has the splits. I have had this get clobbered and caused an unwanted transposed voice to sound..

If you can find other combinations that cause the problem that would aid in pinpointing the exact cause.

This could be a bad disconnect diode or short or break on the keyboard contact board or even a cable between the upper and lower contact boards. (The keyboard contacts are actually split into two groups high and low).

Please be careful in opening the unit. There are lots of screws and some in wells in the back. There are different threads and lengths, Make sure they go back correctely. Be VERY careful of the ribbon cables and their orientation. ALSO the power switch leads are very short... I often remove the switch rather than try to take the leads off.

I can try to find my schematics but that will take a while. If you are not comfortable working on electronics, this is a problem for the shop.

Likely you have damaged the pitch bending wheel and offset it.

Try to pull it on pitch with the wheel... IF YOU CAN, then the alignment of the detent of the wheel has been disturbed and unit will need servicing... There are a lot of screws to open this and several very tender cables that can be damaged... I would recommend you take it to a shop experienced on this keyboard.

One of the tubes COULD be microphonic.

Take back off and use a pencil to lightly tap each tube to see if one causes noise.

If it has a sequencer/ recorder built in, you have the ability to change the pitch/ detune by using some key strokes after initiating the program mode. If your not sure how to do that, try unplugging the keyboard for thirty seconds and push the power button while it's unplugged, then plug it back in. Any better? What model is it.