Korg Kronos 61 Keys not booting

Hello fellow gurus, I have a korg Kronos 61keys but it’s not booting. Please what could be the fault and mode of Repairs?

Please I need your expertise to this regard. Thanks am most grateful.

Need to know what is being displayed on the screen when you power up. Usually the LEDs on the pitchbend/mod joystick light up 1st. I imagine that means the power supply is functional. Are you in warranty?