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Question:

Why can't digital TV set-top boxes receive the signal?!

A few days ago to install digital cable TV, but my TV is not digital TV, and then installed after the installation of staff, debugging found that the TV can not find, suggesting that the network can not connect. Later, the installer said that the TV closed circuit could not receive the signal because of the poor signal after bending.Note: when the original digital TV is not installed, the television effects are good, how can not receive the signal now, and there is radio and television publicity, only that set-top boxes can be watched. But the signal is not good now, I just installed closed-circuit line is near, are buried in the floor, the floor may not open line, get a line from the wall is not good!Ask everybody, do you know why this is caused? And what should I do if I want to solve it?

Answer:

First, check if there is a wired signal. After the general line is converted to a digital signal, there are several analog signal channel signals. This signal is input into the TV to search for it. If normal, usually set-top boxes have problems, first check the signal line is in good contact; second, check whether the smart card inserted firmly, you can pull out, wipe, try.
[specific steps]1, the cable of the white signal line connected to the set-top box behind the radio frequency input port, note that the radio frequency input port next to the loop, the output is not connected, the instructions are usually teaching access.2, connect set-top boxes and TV AV signal line, that is, red, white, yellow, lotus head, there will be the interface behind the TV, there are some very old TV, no, you certainly have. There are multiple AV interfaces behind some TVs, and if you get a AV1, you need to switch to AV1 on the TV after you turn on the TV, and AV2 does the same thing.
3, the allocation of smart cards inserted into the set-top box, pay attention to the direction of insertion and positive and negative, the instructions are illustrated with examples of pictures.4, connect the set-top box power and boot, turn on the TV, switch to the corresponding AV status.If none of the above, it is necessary to find operators (dealers) to deal with (repair, etc.), ask where the smart card.

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