What happens if the TV suddenly doesn t receive a cable signal?

If it is a digital signal in the form of a set-top box, there is no error in the connection, there are two possibilities: one is that the digital set-top box is broken, then the only way to find the manufacturer; The second is that the bit error rate and carrier-to-noise ratio of the signal are incorrect, but the signal strength is no problem, so the analog field strength meter is used to test the signal but the bit error rate and carrier-to-noise ratio cannot be seen, so it needs to be measured with a digital field strength meter. The second should probably not result in no signal for all channels, it should be a mosaic or no signal for a part of the channels.

Also, check whether the wired signal cable is connected to the set-top box, and the AV cable is connected to the ** port. Your AV interface should be good because you can watch CDs. If it's an analog signal, being able to watch a CD doesn't mean that the TV isn't broken.

This problem should be judged by cable TV maintenance personnel!

The camera may not receive a wired signal suddenly, which may be due to the following reasons:

Check whether the cable TV is in arrears.

If there is no problem with the first two items, it may be a fault of your own line.

General Causes and Solutions for Cable TV Suddenly Showing No Signal:

1. If the connection line between the cable TV set-top box and the TV is loose or the contact is poor, resulting in loss of signal, you can check the connection line, reconnect it correctly, and fix it;

2. If the user misoperates, the signal source of the TV is switched to other modes, resulting in no signal display, you can press the signal source key of the TV to switch the signal source mode one by one, until the picture of cable TV is restored.

3. The signal is lost due to the failure of the external cable TV signal transmission line or the server failure of the service provider, and it is necessary to wait for the service provider to repair before returning to normal;

4. The hardware failure of the set-top box or TV causes a sudden loss of signal, which needs to be repaired by contacting the corresponding after-sales service to solve it.

It is estimated that the line is broken.

In the process of using the TV, if there is no signal, there are many possible reasons.

1. What is the reason why the TV shows no signal?

There are three main possible causes, and repairs need to be carried out according to the specific cause.

1、It may be that the connection cable between the TV set-top box and the TV is loose or the contact is poor,In this case, the signal will be lost,The TV will show no signal。 Therefore, you need to check the connection cable between the set-top box and the TV, and you need to connect the connection cable firmly.

2、It may be that the signal transmission line is faulty,You need to check whether the signal transmission line is damaged,If it is damaged, it needs to be repaired in time,After the repair, the TV signal can be restored。

3、It may be that the signal source of the TV is switched to other modes,When selecting the signal source,You need to choose the signal source that can display the TV signal。

2. How to find out why the TV has no signal.

1. Step 1: You need to check whether the TV can be switched on and off normally, and check whether the power switch is turned on.

2、Step 2After turning on the power switch,If the TV is not currently signally input,You can check whether the signal input connection of the TV is smooth,You must check the signal transmission line of the TV。

If the above problems are solved,There is still no signal,Then it is very likely that other components of the TV or the motherboard switch are faulty,The TV needs to be repaired。

What should I do if there is no signal on cable TV at home, hello dear <>, 1. If there is no signal on cable TV, it may be that the connection line between the cable TV set-top box and the TV is loose. 2. You can check the connection line, reconnect it correctly, and fix it. 3. In addition, it is also possible that the user misoperated and switched the signal source of the TV to other modes.

4. In this case, you can press the signal source button of the TV to switch the signal source mode. 5. Secondly, it is also possible that the TV signal transmission line is faulty, and it is necessary to wait for the service provider to repair it before it can be restored to normal. 6. The failure of the set-top box or TV may also lead to no signal on the TV, so you need to contact the after-sales service for maintenance.