Repair korg triton le61

I bought a korg triton le61 when plug in work fine and then i switch off,next when i put on again nothing happen…dont want to switch on…could someone help…

Easy things to check first: Are you getting voltage from the power adapter? You should be able to measure 9V AC there.

Is the power switch working? You can either test with a continuity meter (with no power applied), or you could plug in the adapter, and make sure you are getting voltage through the switch.