CASIO CTX-870IN issue

[svkr]

Dear forum members,
Having an issue with my Casio CTX-870IN keyboard.

After I power ON the keyboard, the display is ON, but it always shows like the attached picture.

Keyboard does not react to any key presses. The display is frozen and the keyboard is practically dead.
Can you please help me troubleshoot the issue.

Thanks in advance.
Regards,
Raj.