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Mad keyboard

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Scarlett | 19:45 Mon 05th Feb 2007 | Technology
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I have a Yamaha (piano) keyboard which is about 10 years old. Last night it was plugged in and turned on, and sudddenly this HORRENDOUS ROAR came from it- it sounded like very very distorted music coming from it. I have no idea how this could happen, as it is not connected to anything, and the demo does not sound like that!
Any ideas what was wrong? I had to unplug the power pack to get it to stop!
  
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Bad earth connection inside the keyboard
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What does that mean, Naz? Is it dangerous?

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Mad keyboard

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