My Ti-nspire cx crashed, i can't boot it

After I reset my Ti-nspire CX, it can't boot.
After showing "This calculator has been modified to enable CAS functionality. ~~", 'white X in red circle' popped up and loading percentage doesn't increase.
How can I figure this out??
After showing "This calculator has been modified to enable CAS functionality. ~~", 'white X in red circle' popped up and loading percentage doesn't increase.
How can I figure this out??