Treatment method:
1. Switch the remote control to the main menu of digital TV → colorful services → system settings → conditional access → smart card settings → working time settings → press the remote control number and the up, down, left and right keys to adjust working time, and the start and end time settings are all 0. Press OK to confirm. After confirmation, you need to enter a password (password is 60 or 12345678), so that the working time setting will automatically become invalid and normal.
2. If the fault still exists after operation, you can call the customer service hotline of the local digital TV operator for warranty.