I own a technics KN6000. I love the keyboard and have used it a lot. But unfortunately, the power button usually doesnt work properly. When I turn on the keyboard, sometimes the keyboard won't turn on, even though the power button is pressed. So, usually, I have to turn the keyboard on and off continually until it finally turns on. If anyone can help me with this problem or knows how I can fix it, I would truly appreciate it.