Turn on the TV and a white line appears, what s going on?

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.

Is it a horizontal white line or a vertical white line If it is a vertical white line, it means that there is a problem with the line scan circuit In this case, most of them are in poor contact It is that the strip is unsoldered there If it is a horizontal white line, there is a problem with the field scan circuit Have you ever entered the factory mode of the remote control If you press ** in the case of factory mode, a horizontal bright line will be formed If you have not entered the factory mode, the horizontal bright line is a problem with the field scan circuit You first check that the voltage that supplies power to the field scan is not normal There are two voltages in the power supply, one is One is, if these two voltages are normal, take a closer look at whether there is false welding in the field sweep part, whether the deflection coil is open or short circuit, when it is determined that there is no false welding, no open circuit, short circuit, and the voltage is normal, replace the field scanning manifold with a try, it should be fine, I have repaired a lot of TV faults, it is a horizontal bright line, and many of them are because the field scan manifold is broken. Satisfied.

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.

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.

A black line appears on the TV screen, hello! The general causes and solutions for the appearance of a horizontal black line on the LCD TV screen: 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 with cable TV, set-top box, *** machine, etc. is mistaken or loose, and it can be solved by reconnecting it correctly and fixing it; 2、If you confirm that there is no problem with the input of the signal source,Generally, it can be judged as a hardware failure,Including display screen failure、Screen wiring failure、Internal circuit or motherboard parts failure, etc.,It is recommended to contact the after-sales service of the TV directly for maintenance。

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If a black line appears on your TV screen, it could be one of the following reasons:

1.Broken screen: If a black line appears on your TV screen, it may be due to a broken screen. This can be caused by the screen being hit or under too much pressure.

2.Signal Issues: If a black line appears on your TV screen, it may be due to a signal issue. This can be caused by an unstable TV signal or a problem with the signal source.

3.Connection issues: If a black line appears on your TV screen, it may be due to a connection issue. This could be due to a poor connection between the TV and other devices, or a problem with the cable.

4.Adjustment issues: If a black line of fries appears on your TV screen, it may be due to an adjustment issue. This may be due to incorrect TV settings or improper adjustments.

If this happens to you, it is recommended that you check if the TV screen is damaged, check if the signal and connection are working, and check if the TV settings are correct. If the problem persists, contact a professional technician for repair.