Cable TV set-top box displays e30-4 encrypted programs. What is the key loss?

Losing the key means losing the password. Usually, if the password is entered incorrectly, or if the password is entered incorrectly frequently, the message that the key is lost will also be displayed. The system is locked, so you can unplug the card from the set-top box, plug it back in and restart it. If not, you should go to the radio and television bureau and ask the staff to check other reasons. There is also the reason for the arrears. As long as the payment is made in time, it will be restored immediately.