Why does the TV screen go black after turning it on? Can the TV turn on but the screen goes black?

LCD TV boot black screen turns out the problem here.

The reasons for the black screen after the TV is turned on are:

1. First of all, it may be caused by the abnormal power circuit, which is manifested as no response to the buttons when pressing the panel, and the indicator light is not on. One possibility is that there is a problem with the input stage of the power supply circuit, and the other possibility is that the load of 5V is increased;

2. If the circuit source is normal, then there may be a problem with the circuit driving the backlight;

3. It may also be that the switch part of the control high-voltage board on the AD board is faulty;

4. There is also a reason that the backlight of the screen is broken or other special circumstances.

Television uses electricity to transmit visual images of the event in real time. Similar to movies, TV uses the visual residual effect of the human eye to show a still image with a gradual change of frames, forming a visual living image. The transmitter of the TV system converts the various fine parts of the scene into electrical signals according to brightness and chromaticity, and transmits them sequentially.

At the receiving end, the luminance and chromaticity of each fine part are displayed according to the corresponding geometric position to reproduce the entire original image. The scanning system of television signals in various countries is not exactly the same as that of channel broadband, and is distinguished by Latin letters according to the recommendations of the International Radio Advisory Committee (CCIR).

The sequential sampling, transmission, and reproduction of TV signals from point to surface is done by scanning. The TV scanning system varies from country to country, but in China it is 25 frames per second and 625 lines per frame. Each line is scanned from left to right, and each frame is scanned in two fields from top to bottom in odd lines and even lines to reduce the feeling of flicker.

During the scanning process, the image information is transmitted, and the counter-scan line before the scanning electron beam returns from the end of the previous line to the starting point of the next line, and the field counter-scan line that returns to the top after each field is swept from top to bottom. A line-field synchronization signal is transmitted during line-field blanking to synchronize the received and received scans to accurately reproduce the original image.

When the power indicator of the TV is off, there is a problem with the power connection of the TV, resulting in a sudden power failure and a black screen, such as a loose power plug and a faulty power cord.

The power indicator of the TV is on, and the user has pressed the standby button of the remote control to make the TV enter the standby state. So the black screen is displayed, just reproduce by pressing the standby line.

If the TV series is still black, it may be caused by hardware failures, such as power module failure, switching circuit short circuit or open circuit, high-voltage board failure, LCD screen or screen cable failure, motherboard chip or other component failure. It is necessary to contact the after-sales service of the TV and overhaul the TV to solve the problem.

The TV can be turned on,But the screen is black,It may be because the display screen of the TV is faulty,So this may need to be repaired,Otherwise,This may affect its use。

The TV can be turned on but the screen is black, generally the display is broken, and the screen cannot be displayed normally. Find a brand to repair and see how it needs to be repaired.

The TV can turn on, but if the screen is black, it should be that his monitor is faulty, and a capacitor on the motherboard that needs to be repaired should be broken.

If the TV screen goes black when turned on, it is a fault in the picture tube or the high-voltage package components around the picture tube, which must be solved by professional electrical repair.

The TV turns on but the screen goes black, which means that your CRT is broken, and the rest of the tube is still intact, so that's what happens.

If the TV is turned on or the screen is black,It may be that the display is broken,Then I can change the display screen,But**It's not expensive,It is better to buy another TV。

The TV can be turned on normally, but the screen is black, in this case, but it is always said that the picture tube of the screen is broken, you can try to restart or replace the picture tube.

In the process of using the TV,If you encounter a black screen after turning on,You can see how long the black screen is,Under normal circumstances, if it is not a hardware problem,It is most likely because of a power outage,Or accidentally press the standby button of the remote control,It may also be a loose power cord,Or the plug behind the TV is loose.

Generally, there are the following situations, which can be excluded one by one:

1. The most common reason is that after the TV is turned on, the remote control accidentally presses the standby button, causing the TV to turn off. At this time, you can see whether the power indicator on the TV is on, and if it is on, it means that there is power. You can turn off the TV first, then restart it, and then press the standby button of the remote control to see if the TV can be turned on.

2. It may be that there is a problem with the power supply or TV line, check whether there is a power outage in the room, a trip, or the power cord plug at the back of the TV has fallen off, and the power indicator on the TV will not light up under this situation. You can check the wiring to see if other appliances are still running, and try to reconnect the wiring from the TV's power supply.

3、If the above reasons are ruled out,It may be that there is a problem with the hardware of the TV,Screen failure,Wide judgment internal circuit board power failure,It may also be a high-voltage board failure、LCD screen or screen cable failure、Power module failure、Motherboard chip,Or circuit board short circuit and other reasons。 These are very complex hardware problems, users do not try to solve and judge for themselves, you can find professional technicians to use professional equipment to detect and confirm. So when you encounter this kind of problem, you must guarantee it as soon as possible, and don't deal with it yourself.

We recommend that you perform troubleshooting based on the following scenarios:

1.If the power screen is black (the sound is normal), you can try to power off and restart the device;

If you can see the screen after the power is off and restarted, you can go to "Settings" - "Image" - turn off "Dynamic Backlight", and adjust the "Backlight Intensity" to "70" (adjust the size of the number through the left and right buttons of the remote control). If the problem of "black screen but sound" still occurs after adjustment, you can adjust the "backlight intensity" to 30.

3.If none of the above can solve the problem, you can apply for after-sales inspection.