if there is no power to your keyboard, I suggest checking the following :-
  1. the plug is turned on at the mains socket on the wall
  2. the cable is properly inserted in the back of the keyboard
  3. the power button is pressed on the keyboard

If none of this works, I suggest trying to plug the keyboard into a different plug socket and repeat the checks above. If this doesn't work, it could be a fault with the power supply (they cost around £ 30 to replace) or the keyboard.

If it transpires that you need to replace the keyboard and you are in the UK, then I recommend speaking to Chris or David at www.epianos.co.uk/decplay - they know much more than me about the pros and cons of the different models and offer a wide range of new and used keyboards with UK delivery.

I hope this helps.