The mainframe requiring a password has nothing to do with adding or not adding songs. The password is the mainframe that needs to be repaired when the memory electricity of the motherboard is exhausted. If the password cannot be entered, please first check whether the serial number for the song library displayed on the TV is the same as your warranty (card) serial number. If it is a different serial number skipping it is a sign of song library malfunction. It may be that the song library is faulty or the motherboard is faulty, or that you are unable to enter it because you are connected to the coin slot.
