What are the symptoms of a lightning strike on a TV?

After the TV is struck by lightning, the parts that are generally easy to be damaged include the power supply part and the rectifier bridge.

switches, etc., followed by small signal processing circuits, CPUs, host blocks, etc. There are generally two situations in which a TV is struck by lightning:

1. Lightning enters from the 220-volt line and damages the power supply inside the TV, and the TV will have no light, no picture, and no sound.

2. Lightning enters from the antenna (closed circuit), which damages the high-frequency head, small signal processing circuit, and decoding circuit in the machine, and the TV will have faults such as light and no picture or light and sound without picture, picture and sound, and no color.

3. Generally encounter thunderstorms.

The power plug of the TV should be unplugged first to completely cut off the power; secondly, the signal line can be pulled out; This will protect you from lightning strikes. If the TV is damaged due to lightning strikes, it is recommended to contact the TV's after-sales service for repair.

There are generally two situations in which the TV is struck by lightning: one is to enter the TV from the 220-volt line and damage the power supply, and the TV will have no light, no picture, no sound, that is, three nos. The second is to enter from the antenna (closed circuit), so that the high-frequency head, small signal processing circuit, decoding circuit and other faults in the machine will appear, and the TV will have faults such as light and no picture and no sound or light and sound without picture and sound, picture and no sound, and no color.

Whether it can be repaired depends on the degree of damage caused by lightning,Under normal circumstances, most of the TVs that are damaged by lightning are mainly based on the switching power supply of TV,These integrated circuits in the switching power supply will basically be broken down by lightning,Secondly, there will be some triodes and other electrical components will also be damaged to varying degrees。 At this time, only the worse power supply and other components that have been damaged by lightning are sufficient.

But there is one thing that needs to be known when this happens,If your TV is still under warranty,You can get the repair point designated by the manufacturer to repair,But,Because being struck by lightning is"Uncontrollable force"Factor,So it is likely that the after-sales repair shop will let the repair cost come out,Of course,There are also some brands of after-sales service that are more humane,If it is not too serious damage, it will not give up additional maintenance costs,But even so, It is still recommended that you try not to watch TV during a relatively large thunderstorm.

So how to prevent the TV from being struck by lightning in ordinary use? First of all, don't use the kind of signal receiver that is placed outdoors, this receiver will become a big "lightning rod" in a thunderstorm! The second is that it is best to unplug the power plug of the TV, because this is also a major way for the TV to be struck by lightning, so be careful!

Yes. Here's why:

Generally, when watching TV during lightning time, most of the interference on the screen or audio track comes from the radiant energy of lightning, rather than the energy of induction or discharge. If it is only this kind of radiant energy that interferes with the work of the TV, it will not cause damage to the TV. And the real disadvantage of the TV is that the lightning hits the wire line or ** line used in your hall, which will cause the wire to produce an instantaneous high voltage At this time, the high voltage may break through the electrical components, and the serious one may burn the TV picture tube, and the slight one will also burn the fuse tube.

Extended information: Surge protectors are now available in the distribution boxes of new buildings. In the event of an instantaneous overvoltage, the pressure relief channel will be automatically activated to keep the voltage fluctuation within the allowable range. Therefore, it is nothing if you don't pull the plug on an ordinary thunderstorm.

However, although the surge protector is good, there are times when it cannot withstand strong thunderstorms. Moreover, old communities and rural self-built houses often do not have protectors, so it is more reliable to unplug in case of strong thunderstorms.

Lightning strikes will be damaged, and the voltage that is hit when lightning strikes is very high, as long as everything that is hit will be broken.

Lightning strikes have nothing to do with the screen Lightning strikes are TV signals damaged by the motherboard Need to replace the motherboard about 300 yuan.

LCD TVs are susceptible to lightning strikes because they have outdoor circuits and need to transmit signals.

In addition, lightning can be divided into direct lightning and lightning induction. The main "culprit" affecting the safety of household appliances is lightning induction. The so-called lightning induction refers to the high-intensity electromagnetic induction generated on various metal pipes and wires entering the building when lightning occurs, resulting in a sudden increase in the voltage of wire conductors and causing household appliances to burn out or even burn out.

It's not that the LCD TV is easy to be struck by lightning, it's that the wires are easy to be struck by lightning at that time, which causes the LCD TV to be damaged.

Why are TVs afraid of lightning strikes now? What the master doesn't tell you, I'll tell you all!

There are two ways in which lightning strikes household appliances.

1.It is a lightning strike from the power supply, because the voltage of lightning strikes is a high voltage of several thousand volts to tens of thousands of volts or more, and these lightning strikes are easy to pass through the household power supply to cause electrical appliances to cause electrical beakers. The best lightning protection method is to knock down the indoor leakage switch during a thunderstorm, and at the same time unplug the electrical appliances from the power socket, and try not to use electrical appliances to reduce unnecessary losses.

2.Thunder and lightning can also be conducted through cable TV antennas, if there is a thunderstorm, the TV power supply should be unplugged from the socket, and the external TV antenna needs to be unplugged from the socket to ensure the safety of the TV and reduce unnecessary losses.

One: Does your TV have insurance, so you can react.

Two: If you are not insured, go to the maintenance department to repair it and spend some money.

Three: It is recommended to install lightning protection equipment, such as lightning rods. Prevent problems in the future.

Lightning strikes refer to the death or damage caused by electric current passing through people, animals, trees, buildings, etc. during lightning.

The discharge between the clouds is harmful to the aircraft and has little impact on the buildings, people and animals on the ground, but the discharge of the clouds to the earth is very harmful to buildings, electronic and electrical equipment and people and animals. Once it causes harm to everything, it can be called being struck by lightning.

A part of the charged cloud and another part of the charge of the cloud, or the rapid discharge of the charged cloud to the earth. This rapid discharge process produces intense lightning accompanied by a loud sound. This is what we see with lightning and thunder.

Of course, the discharge between the clouds is mainly harmful to aircraft and has no great impact on buildings, people and animals on the ground, and the discharge of clouds to the earth is very harmful to buildings, electrical and electronic equipment, and people and animals.

In general, there are three main forms of lightning strikes: one is the rapid discharge between the charged clouds and a certain point on the earth, which is called"Direct lightning strike"。The second is that the charged cloud layer is charged with a heterogeneous charge in a certain area of the ground due to electrostatic induction.

When the direct attack of the lightning occurs, the cloud charge disappears quickly, and some areas of the ground due to the large dispersion resistance, so that there is a local high voltage, or because of the direct lightning discharge process, the strong pulse current to the surrounding wires or metal objects electromagnetic induction to produce high voltage resulting in lightning strikes, which is called"Secondary thunder"Or called"Induction Thunder"。The third is:"Spherical mines"。

<> the reason why the TV does not appear after a lightning strike: lightning from the antenna will cause damage to the high-frequency head of the TV, and the TV has no signal, and the screen has no light, sound and image; The intrusion from the source of the electric mountain crack will cause damage to the TV switching power supply, and the TV will have no light, no sound and no image. The group is suspicious.

Yes. So will the thunder cause the TV to malfunction? Let's see what the experts have to say.

When I watch TV when there is thunder, the image is very unstable, the interference is large, and I am always a little scared, worried that the plane will be destroyed and people will die, is this possible? In fact, as long as the outdoor antenna is not connected, the TV is used indoors, and there is generally no need to be frightened, because although the thunder and lightning are powerful, before entering the room, the thunderstorm clouds have already discharged with the earth. In the short discharge process, most of its huge energy is converted into heat, light and other energy, so it will not cause harm.

Usually when lightning strikes, when watching TV during the event, most of the interference on the screen and in the accompanying sound is the radiant energy of lightning, not the energy of induction or discharge. This kind of radiant energy generally does not damage the TV. However, it must be emphasized that it is dangerous to use an outdoor antenna or to watch television outdoors during a thunderstorm, and lightning protection measures must be taken if it is monitored.

There are two main occasions for lightning strikes, one is indoors and the other is outdoors. Let's talk about how to avoid lightning strikes in both cases. If it's raining and thundering and you're indoors, it doesn't mean you're safe from lightning.

At this time, you should close the doors and windows, turn off the electrical appliances that are in use in the home, such as televisions, hair dryers, etc., and unplug the power plugs. You also need to stay away from indoor metal facilities, such as radiators, sewer pipes, doors and windows, and away from power lines, ** lines, broadcast lines, etc., to prevent being struck by lightning. Also, don't wear damp clothes at home, and don't lean near damp walls, which can be dangerous to you.

It seems that it is not impossible to watch TV on a thunderous day, but it is necessary to have certain measures to watch TV. For the sake of safety, you must not be sloppy. For more TV information, please pay attention to the Maiyoge electrical network.

Yes, and there is no regularity to follow in repairing a TV that has been damaged by lightning, and many circuits may be damaged, so when there is a cloud and lightning, it is necessary to unplug the antenna and power cord when it is safe to do so. (The situation is much better if the building has a lightning rod).