Casio CTK-1500 user manual

The Casio CTK-1550 has 61 keys.

The Casio CTK-1500 keyboard has 61 keys.

If the power of your Casio CTK 2550 portable keyboard does not turn on, you can try the following troubleshooting steps:
1. Check the power source: Ensure that the keyboard is plugged into a functioning power outlet or that the batteries are fully charged and correctly installed.
2. Test the power adapter: If you are using an AC adapter, check if it is working properly by testing it on another device or trying a different power adapter.
3. Check the batteries: If you are using batteries, ensure that they are fresh and correctly installed. Try replacing the batteries with new ones.
4. Remove any external devices: Disconnect any external devices connected to the keyboard, such as headphones or MIDI equipment, as they could be pulling power away from the keyboard.
5. Reset the keyboard: If none of the above steps work, try performing a factory reset on the keyboard. Consult the user manual or Casio's website for instructions on how to perform a reset.
6. Contact customer support: If the keyboard still does not turn on after trying the above steps, it may be necessary to contact Casio customer support for further assistance or to arrange for repair or replacement if the keyboard is still under warranty.