A white line appeared in the middle of the TV, how to fix it, I plan to fix it myself,

You're a woman, and you're going to fix your own TV, and that's a good spirit. But this is a technical job, at least the internal wire is broken, and you have to have an electric soldering iron to repair it.

So I think it's better to repair it, 80 yuan is also the basic price, if you can negotiate the price to 50, then you don't hesitate to repair him. Don't bother yourself. It's not easy for everyone.

Also, I don't know if you're a**? If you are in the same place as me, I can give you a free repair.

The cause is a field scan circuit failure. Focus on the field output IC, field output power supply circuit and field output circuit capacitance, potentiometer and deflection coil. Under this fault, the brightness must be reduced (the horizontal line can be seen), otherwise it is easy to cause damage to the picture tube.

You want to repair it yourself, and this spirit is admirable. But how much do you know about TV, at least you have to understand the general principle before you can start. After I'm here, can you fix it yourself?

There is a white line on the TV,It is a field scanning circuit failure,Generally because the field manifold is in poor contact,Or the field output voltage has a component damaged,It can only be repaired after inspection,Will you repair it yourself?

The easiest way is to hit it hard with a hammer, so that there is no white bar, and you will never see it.

I'll fix it for you, hehe!

The field scan is not working, first test whether the voltage of the field scan is normal, and then check whether the integrated and peripheral components are normal!

If you get wet, blow the motherboard with a hair dryer.

Bright lines? Go fix it, the higher you do it, the bigger it will be.

Unless you can read the circuit diagram in the TV manual.

If a black line appears in the middle of the TV, it may be a problem with the signal source. You can try to check whether the signal source connection line has poor contact, in addition, it may also be that there is a quality problem with the signal source connection line, try a new connection line, and it should be able to recover.

If the position of the black line on the TV screen is fixed, it may be caused by the failure of the TV screen or screen cable and logic board, and this situation needs to be repaired one by one to check the specific fault source for specific implementation.

Taking the screen cable failure as an example, the specific maintenance methods are as follows:

1. The screen cable can be moved, twisted and bent, and can adapt to special package sizes and different shapes.

2、When there is a screen failure,You should first disassemble the back cover of the TV,Carefully observe whether the circuit board is abnormal,The main thing is to find the components affected by heating。

3. If it is found that the heating of the LCD panel is particularly serious, and the connection part of the contact LCD panel is under the frequent alternation of cold and heat, it is easy to cause poor contact at this time.

4. If you disassemble the decoder board and power it on after installation, there will still be black wires; After checking the contacts with a magnifying glass, there are no problems such as virtual welding, pull out the cable, wipe and clean the contacts and connect the machine to turn on, there are still black lines; Move the root of the plug of the cable, the image of the TV is normal, it means that it is a plug problem, and you can deal with the plug directly.

5. If the cable problem is serious, you can replace the screen cable with a new one.

Summary. Method 2: 1. There is a problem with the signal source or program source.

Check whether there is a problem between the signal source and the program source, reconnect if the signal source is faulty, and switch the program if there is a problem with the program source. You can reconnect the line of the signal and the ** line of the set-top box,Switch to other program channels for testing,If other programs do not appear black belt,It is not the reason of the TV itself。 2. The backlight plate of the TV is faulty.

If the picture tube of the TV is broken, or if there is a problem with the color setting in the monitor settings, there may be a black line in the middle of the TV screen, and you can get close to the screen to see if there are slight fluctuations in light on the screen, and if so, there may be a problem with the backlight plate. The LCD screen is composed of many horizontal and vertical tubes, and the two intersections will emit light, and if a horizontal or vertical line is added, the light will become black.

Hello, there is a black line in the middle of the TV, and the solution is as follows:

Method 1: 1. Check whether there is a problem with the signal source input of the TV that causes the black line to appear, such as whether the connection between the first loss and cable TV, set-top box, *** machine, etc. is wrong or loose, and it can be solved by reconnecting it correctly and fixing it. 2、If there is no problem with the input of the signal source,Generally, it can be judged as a hardware failure,Including display failure、Screen wiring failure、Internal circuit or motherboard zero reputation old parts failure, etc.,It is recommended to contact the after-sales service of the TV directly for maintenance。

Method 2: 1. There is a problem with the signal source or program source. Check whether there is a problem between the signal source and the program source, reconnect if the signal source is faulty, and switch the program if there is a problem with the program source.

You can reconnect the line of the signal staring and the ** line of the set-top box,Switch to other program channels for testing,If there is no black belt in other programs of Capipity Disturbance,It is not the reason of the TV itself。 2. The backlight plate of the TV is faulty. If the picture tube of the TV is broken, or if there is a problem with the color setting in the monitor settings, there may be a black line in the middle of the TV screen, and you can get close to the screen to see if there are slight fluctuations in light on the screen, and if so, there may be a problem with the backlight plate.

The LCD screen is composed of many horizontal and vertical tubes, and the two intersections will emit light, and if a horizontal or vertical line is added, the light will become black.

A white line in the middle of an old TV?

Tube CRT TVs require field, line scanning. Circuit.

The role of field scanning: the role of scanning the full screen (up and down) line scan within a certain (specified) time: scanning the full screen (left and right) in a certain (specified) time The fault of the field scanning:

The occurrence of a 'white line in the middle' is a field scanning problem: vibration stopping, field power supply resistance, field damage, deflection coil open circuit, etc., so that the field has no motion and the 'grating' cannot be opened.

A white line in the middle of the old TV: a white line tells us: line scanning is working normally, high voltage is normal, and the picture tube is working normally, at this time, a white line means: field scanning failure. Most of the faults are the field ** burned or the field ** power supply problem.

If this is to pass the color TV, the first measure of this fault is the field output integrated circuit chip,Whether the foot to the ground is normal,If there is an abnormality,Check the components around the chip abnormality,If the components around the measurement chip are normal, then directly change the field output chip。 Second, if the above TV is an LCD TV, then this fault is a problem with the screen, if it is a problem with the screen, contact the after-sales service and ask them to help you get it. Generally, there is a vertical line in the middle of the TV, in this case, the solution is to see if it is caused by the failure of the display screen,Generally, it is necessary to repair the LED screen electrocution first,In the case of not working, it can only be said to replace a new display。

Or when there is a problem with the input of the TV's signal source, you will see a vertical line in the middle of the TV. At this time, we can first check whether the connection cable between the TV and the cable TV or the set-top box is normal. If the cable is loose, you can replace it with a good one and reconnect it.

2. How to maintain the TV?

Since we know how to solve the problem of a vertical line in the middle of the TV, let's take a look at how to maintain the TV. The first thing is to protect the LCD screen,Today's TVs are intelligent,So it is even more important to maintain it carefully。 You can buy a special screen cleaner to scrub it.

Then there is dustproof, moisture-proof, heat-proof protection, in order to be able to achieve these three kinds of protection, we can use a special dust cover to cover the TV when it is not used for a long time, and the TV can not be placed in a humid place.

Do you now have a certain understanding of a vertical line in the middle of the TV? In order to be able to better repair the TV, we have to control the time we watch TV and carry out regular maintenance to increase the life of the TV.

Summary. 1. There are two situations when a line appears on the TV screen; One is a horizontal bright line, which is generally caused by the virtual soldering phenomenon of the field output tube, which causes problems in the field scanning circuit part. The other is a vertical bright line, which should be a problem with the line scan circuit.

2. The bright line on the TV screen is generally mainly checked to see if these two components are damaged, resulting in no power supply or unstable power supply

3. Check whether the IC of the field block is damaged;

4. Check whether the off-site capacitor is damaged.

What's the deal with a horizontal white line on a TV screen? Which component is broken?

Hello, I have seen your question and am sorting out the answer, please wait a while What is the reason why there is a white horizontal line in the LCD TV display screen.

1. There are two situations when a line appears on the TV screen; One is a horizontal bright line, which is generally caused by the virtual soldering phenomenon of the field output tube, which causes problems in the field scanning circuit part. The other is a vertical bright line, which should be a problem with the line scan circuit. 2. The bright line on the TV screen is generally mainly checked to see if these two components are damaged, resulting in no power supply or unstable power supply

3. Check whether the IC of the field block is damaged; 4. Check whether the off-site capacitor is damaged.

Hello,1、If the position of the white line on the TV screen is uncertain,It may be that there is a problem with the input of the signal source of the TV or a problem with the program source; At this time, you should check whether the connection line of the signal source is in poor contact, and if necessary, you can reconnect the connection line to test it; If it is a problem with the program source, you can directly change it to other channels.

2. If the position of the white line on the TV screen is fixed, it may be caused by the failure of the TV screen or screen cable and logic board, which needs to be solved by contacting the after-sales service of the TV for comprehensive inspection and maintenance.