When the TV is used, the black screen is a fault that is occasionally encountered. It is also the most common situation in various TV faults. Every TV set has a black screen. What is the reason for the black screen of the TV ? What should I do with the black screen of the TV? The following decoration home decoration network Xiaobian will give you detailed answers, I hope to provide help for everyone.
What is the reason for the black screen of the TV?
The black screen of a TV is a malfunction phenomenon of TV, and it is also the most common, showing no image. There are two main situations in the black screen of the TV; one is that there is no image, there is sound, the TV screen is not bright; the other is that there is no image, no sound, and the TV screen is bright. These two conditions are the most common black screen phenomenon.
The black screen of the TV may also refer to other phenomena, such as HDMI input without image; USB input without image; AV/S/HDTV input without image; VGA input without image. In addition, there is only one horizontal bright line on the screen; there is only red/green/blue monochrome on the screen; there is only one vertical bright line on the screen; MITV has no image; there is a retrace bright line on the screen; there is no image on the screen, etc. .
1. First of all, it may be caused by abnormal power supply circuit. It means that there is no reaction when the button is pressed, and the indicator light is not bright. One possibility is that there is a problem with the input stage of the power supply circuit; another possibility is that the load of 5V is aggravated.
2. If the circuit source is normal, there may be a problem with the circuit that drives the backlight.
3, there is no problem in both aspects of the appeal, then it may be that the circuit on the AD board controls the high voltage switch is faulty.
4, there is the backlight of the screen is broken or other special circumstances.
What should I do with the black screen of the TV?
1, the power supply circuit is not normal, first check the 12V voltage normal, or follow the 5V voltage, if there is no 5V voltage or 5V voltage becomes very low, the power circuit input stage has a problem. This kind of fault is very common, usually it is burning insurance or the voltage regulator chip is faulty, and the relevant parts can be replaced.
2, the circuit that drives the backlight has a problem, connect the display to the host to check the boot, close to the screen to observe carefully, the common fault of the high voltage board is the insurance of the high voltage board itself burned, causing no 12V supply and switch chip failure, etc., replace the relevant parts .
The above is what is the black screen of the TV set brought to you by Xiaobian? What should I do with the black screen of the TV? I believe that everyone has a basic understanding of the black screen of the TV after reading this article. If you want to know more about decoration, please click to enter the decoration knowledge channel.
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