Why did my TV turn black and white after connecting to the set top box

The main reasons are:

1. The mismatch between the TV format and the set-top box causes the color to turn black and white; Generally, you can use the remote control to operate, press the menu button to enter the system settings, find the color system, and select the [PAL system] after entering.

Or set it to [Automatic] to solve the problem and return to normal;

3. The hardware failure of the TV or set-top box causes the color to turn black and white, such as the failure of the color decoding circuit inside the TV, and the color signal cannot be interpreted, so it can only display the black and white picture.

If you are a Unicom user, after the TV is connected to the set-top box, the image becomes black and white, and you can troubleshoot according to the following reasons:

Reason 2: The output standard of the TV does not match the output standard of the set-top box, and the set-top box defaults to the PAL standard. Solution: Use the TV remote control to change the output of the TV to auto, please refer to the TV instruction manual for details.

Generally, the color system of domestic TVs is PAL,Most set-top boxes only support PAL, but some of them still support NTSC (foreign standard),So you first look for the tone ** setting item in the system settings of the set-top box,See if the TV standard has PAL、NTSCThe two items can be replaced。 In short, adjust the set-top box first, if you are sure that the set-top box only supports PAL, and your TV is NTSC standard, then there is no way.

Summary. Possible reasons and solutions for turning black and white after the TV is connected to the set-top box: 1. The image mode of the TV is changed to "nostalgic mode".

Workaround: Change back to Standard Mode or Soft Mode. 2. The backlight plate of the TV screen is abnormal or broken.

Solution: Let a professional master disassemble the machine for inspection and maintenance. 3. The color TV turns black and white because there is a problem with the color system of the TV.

Solution: You can set the TV system to "Auto" or "PAL" in the menu bar of the TV, and if it is a digital set-top box cable TV, you can set the system to "Auto" or "PAL" in the menu bar of the digital set-top box. 4. The phenomenon of virtual soldering occurs in the TV circuit.

Solution: First of all, find out the position of the circuit virtual soldering, after finding the position of the virtual soldering of the TV, re-soldering the place of the virtual soldering, and connect it well to solve the problem of color TV turning black and white caused by the virtual soldering of the TV circuit board. 5. The color degree was adjusted to 0.

What to do if the LCD TV and the digital set-top box are connected to the black and white screen.

I'm still a little confused, can you be more detailed?

Possible reasons and solutions for turning black and white after the TV is connected to the set-top box: 1. The image mode of the TV is changed to "nostalgic mode". Workaround:

To change back to Standard Mode or Soft Mode. 2. The backlight plate of the TV screen is abnormal or broken. Workaround:

Let the professional master disassemble the machine for inspection and maintenance. 3. The color TV turns black and white because there is a problem with the color system of the TV. Workaround:

In the menu bar of the TV, you can set the standard of the TV to "Auto" or "PAL", and in the case of a digital set-top box cable TV, you can set the system to "Auto" or "PAL" in the menu bar of the digital set-top box. 4. The phenomenon of virtual soldering occurs in the TV circuit. Workaround:

First of all, it is necessary to find out the position of the virtual soldering of the circuit, after finding the position of the virtual soldering of the TV, re-soldering the place of the virtual soldering, and connecting it well can solve the problem of color TV turning black and white caused by the virtual soldering of the TV circuit board. 5. The color degree was adjusted to 0. Workaround:

Causes and workarounds:

1. The user mistakenly presses the button of the remote control or the TV, which changes the standard of the TV (such as switching to the NTSC standard or other standards), causing the color to become black and white; Generally, you can use the remote control to operate, press the menu key to enter the system settings, find the color system, and select [Medium Hail PAL System] or set it to [Auto] to solve the problem and return to normal.

2. Check whether there is a problem with the signal source input of the TV, such as whether the connection line between the TV and the set-top box is loose, and the black and white picture Qibi appears due to poor contact, and reconnect it correctly and fix it to solve the problem.

3. Check whether there is a problem with the current program source, such as the current program is a black and white picture, which can be solved by switching the program channel.

4. The hardware failure of the TV or set-top box causes the color of the sail to change to black and white, such as the failure of the color decoding circuit inside the TV, and the color signal cannot be interpreted, so it can only display the black and white picture, in this case, it is recommended to contact the corresponding after-sales service for comprehensive testing and warranty to solve.

It is possible that the standard of the TV has changed due to the user pressing the keys of the TV by mistake, causing the color to change to black and white. If this is the case, you can generally use the remote control to operate, press the "menu key" on the remote control to enter the system settings, find the "color system", and select it after entering"PAL Format" option or set it to "Auto", and the TV will return to color.

In addition to the above reasons,You can also check whether there is a problem with the signal source input of the TV,That is, check whether the connection line between the TV and the set-top box is loose,Because it may also be caused by poor contact,If this happens,You only need to reconnect the line correctly and fix it。

And the third point is to check if there is a problem with your current program source, if the current program itself is black and white, then you can solve the problem by switching the program channel.

The last point,It may be caused by hardware failure of the TV or set-top box,For example, the color decoding circuit inside the TV fails,In this case, it can't interpret the color signal,Therefore, there is a white picture,If this is the case, it is recommended to contact the corresponding after-sales service to help you solve the problem by comprehensive testing and warranty of the TV。