I have sold many 900's so far and have not had any customers experience anything like you are reporting. I wonder if the external midi pedal device is sending some kind of signal the 900 doesn't like.
One customer received his 900 with the connecting cable from the keyboard disconnected to the main board. This could easily been caused by shipping from California to Ohio. This was fixed by simply taking the screws out of the bottom. Another unit I shipped has a loose screw around one of the speakers......also easily fixed by the customer. That has been the only two issues I've experienced. None of the 900's i've sold has experienced any strange button or dial issues.
I've notified the proper people at Yamaha regarding the loose cable and screws. They will get this information to the factory which manufactures these in Indonesia.
As someone who sells these, I would ofcourse like to see not a single problem arise, but sometimes things like loose cable and screws are either a shipping problem or someone not fully tightening a screw or pushing a cable in far enough. The manufacturer needs to be made aware of such issues and as stated, I've notified Yamaha and I'm sure they don't take things like this lightly........ I agree with Scott. You can call Scott Deming at Yamaha. When I arrive at my store this morning, I will be calling the Product Manager as well and letting him know of your problems.


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George Kaye
Kaye's Music Scene
Reseda, California
818-881-5566
www.kayesmusicscene.com