Why my keyboard not turn on?When I press power button on my Yamaha PSR I455 Keyboard, the LCD comes ON and goes OFF when I release my finger from...
"PSR I 455 is not starting. Adaptor is ok. What's the problem." için yanıtCheck with batteries.. Check AMJK board fuse.. Check power button.. Then check AMJK power supply circuit Diode, Regulator IC, Capacitor etc. This is what I saw as solution in other forums.. Let me know if you find where is the issue