The set top box has a normal TV black screen, and the set top box has a signal but the TV has a blac

There may be the following reasons why an LCD TV has a black screen:1. The screen drive circuit inside the LCD TV has a fault caused by virtual welding.

2. There is a problem with the power supply itself, which causes the power supply to fail to start.

3. Part of the circuit of the AD board in the TV to control the switch of the high-voltage board is burned out.

4. The backlight of the TV screen is broken or other special circumstances.

5. First of all, it may be caused by the abnormal power circuit, which is manifested as the button does not respond when pressing the panel, and the indicator light does not light up. One possibility is that there is a problem with the input stage of the power circuit; Another possibility is that the load of 5V is heavier. 6. The output problem of the set-top box causes the TV to have no image output.

Workaround:2、If it is caused by the failure of the backlight driver,You can get close to the screen to check whether the TV screen has a weak picture,But there is no backlight,If it is, it means that the TV A D driver board is normal,The problem appears on the high-voltage board and high-voltage board switch that drive the backlight。

You have the wrong channel on your TV.

1.It's not intentional, after plugging in the set-top box, the screen is temporarily black due to poor network signal.

2.Restart the set-top box and TV to resume normal viewing.

It is possible that the interface connected to the network cable has been damaged, that is, the crystal head of the network cable has been damaged, and the network cable needs to be replaced to be able to return to normal.

This problem is that you have pressed the source button on the TV remote control by mistake.

You should set the signal input source of the TV to the signal of the set-top box, which is generally HDMI, in order to watch TV.

There is a signal source or a button with a similar name on the TV remote control,Press the button repeatedly,Select the correct signal source,You can see network TV。

If you can't find it, take a picture of the remote control and send it up.

Possible Causes of Black Screen of Digital TV Set-top Box::

1. The TV is switched to other signal sources that are inconsistent with the ** signal output by the set-top box. Solution: Press the "Source" button of the TV remote control and switch to the ** source that is consistent with the set-top box.

2. The set-top box is dead. Solution: Open the set-top box again.

When I light up my brothers on **TV, I suddenly found that the picture of the TV turned into a black screen, what should we do at this time?

First of all, we need to check the connection of the set-top box. If the cable between the set-top box and the TV is loose or plugged into the wrong interface, it will cause the TV to be black. At this time, we need to check the connection cables between the set-top box and the TV to make sure that they are plugged in tightly, and there is no problem with the socket.

Secondly, we need to check whether the power supply of the set-top box is normal. If the set-top box is not plugged in, or the power cord is loose, then it will also cause the TV to go black. At this time, we need to check whether the power supply of the set-top box is normal, if not, we need to plug the power cord again.

Finally, we need to check the settings of the TV eggplant. Sometimes, the incorrect settings of the TV can also lead to a black screen. At this time, we need to open the settings menu of the TV and check whether the correct input source and channel are selected.

If the settings are correct, but the TV is still black, then we can try to restart the TV and the set-top box, or contact the after-sales service.

In short, there may be many reasons for the black screen of a set-top box TV, and we need to be patient to check and troubleshoot in order to find the problem and solve it.