When digital TV jumps out of the prompt "Please insert smart card", it usually means that the digital TV set-top box needs to insert smart card before it can be used normally. Smart card is an integrated circuit card, which can store subscriber information and decryption information of users, so that users can watch pay channels or HD channels. Smart cards are usually provided with digital TV set-top boxes and need to be inserted into the smart card slot of digital TV set-top boxes before they can be used.

If the smart card has been inserted, but you are still prompted "Please insert the smart card", it may be caused by incorrect insertion of the smart card or poor contact of the socket. You can try to insert the smart card again, or clean the smart card socket and smart card metal contacts to ensure that the socket and contacts are clean and dust-free and have good contact. If the problem still exists, it is recommended to contact digital TV operators or set-top box manufacturers for consultation and maintenance.