The TV turns on and the screen flashes after a while, what s going on?

The reason why the TV screen is unstable and always flashes and how to deal with it:

1. Check whether the power supply voltage of the TV is stable, if it is unstable, it will cause flickering.

CCTVWhether the antenna is in poor contact, etc., whether the signal source problem is normal (you can test switching to other programs), and if there is a DVD player at home, you can test the signal source.

3. When none of the above methods can be solved, it is generally caused by the hardware failure of the TV, such as the screen or cable failure, internal circuit failure, motherboard and its parts failure, etc., it is recommended to contact the after-sales service of the TV for maintenance.

If the power supply is undervoltage or the power supply is insufficient, a power regulator shall be installed. The problem of TV resolution needs to be reset again.

There is slight electromagnetic interference around the TV.

Switch the TV to another location. The refresh rate of the TV is too low, and the refresh rate is increased to 75Hz or more.

There is a problem with the internal circuit of the TV,If there is an internal problem, it is recommended to contact the after-sales maintenance department of the brand,Find a professional maintenance personnel for inspection and maintenance。 Television is a machine that uses electricity to disseminate optical information according to the visual persistence characteristics and visual psychology of the human eye. The basic system of a television set consists of a camera.

It consists of 3 parts: transmission and imaging.

1. The power supply voltage of the TV is unstable, causing the screen to flash and flash; 2. The input contact of the inspection signal source of the TV is poor; 3. The hardware of the TV is faulty. Specific solutions: 1. First of all, check whether the power supply voltage of the TV is stable, if it is unstable, it will cause it to flicker all the time.

Open the back cover of the TV first, then remove the circuit board inside, plug in the TV power supply, turn on the power supply, and then measure the main power supply, find out the problem if the contact is bad, and replace it in time if the power supply is broken. 2. There is a problem with the input of the check signal source of the TV, it may be whether the input line or the closed-circuit TV antenna is in poor contact, and whether the signal source problem is normal, you can test and switch to other programs. 3. Caused by the hardware failure of the TV, it may be the screen or the cable failure, it may be the internal circuit failure or the failure of the motherboard and its parts, etc., it is recommended to contact the after-sales service of the TV for maintenance.

Precautions for TV purchase: 1. LCD panel. The panel is the most core component,When purchasing, you should pay more attention to what kind of panel the product is used,Users need to pay attention to the fact that the vast majority of ultra-low-cost LCD TVs on the market are basically using Taiwan AUO Chimei soft screen,Users must not be deceived。

2. Dynamic effects. If users pay more attention to the performance of the product in the static picture or color,LCD TV will be the user's first choice,If you care more about the performance of the product in the dynamic picture,Plasma TV is better。 3. Functional performance.

3D display technology or intelligent operating platform, when purchasing, you should also pay attention to the products that add these functions.

1. The power supply voltage is unstable. It is recommended to check whether the power supply voltage of the TV is stable first, if it is unstable, it will cause flickering. Open the back cover of the TV, then remove the circuit board, plug it in, turn on the power, and measure the main power supply.

Whether the antenna is in poor contact, etc., and whether the signal source problem is normal (you can test switching to other programs).

3. TV hardware failure. The hardware failure of the TV can easily lead to the failure of the screen or cable, the failure of the internal circuit, the failure of the motherboard and its parts, etc., it is recommended to contact the after-sales service of the TV for maintenance.

1. Ordinary TV screens.

When cleaning the TV screen, be sure to scrub it with detergent and a clean soft cloth when it is turned off, or use a cotton ball dipped in magnetic head cleaning liquid to wipe the cavity shirt, but wipe it dry. Do not use a feather duster or silk to clean, because they will generate an electric charge after rubbing against the glass on the screen, so that the dust and silk wool on it will adhere more to the screen glass, so that the cleaning work is counterproductive.

2. LCD TV screen.

If the screen is accidentally stained with stains that are not easy to clean, such as modified juice, saliva or coffee, you can use a special liquid crystal wiping cloth to spray an appropriate amount of ion-free water to make the wiping cloth slightly moist, and then wipe it again, so that the stains will not be traced without scratching.

LCD screen too. Because the special liquid crystal wiping cloth is made of special fibers, it has a much better wiping effect than the general glasses cloth, and it is soft and will not scratch the screen, and it also has the unique function of dissipating static electricity.

3. Plasma TV.

Screen. Dust attracted by static electricity on the plasma screen is inevitable, and wipe the screen too often, use a special cloth for TV, do not wipe with chemicals, otherwise it will destroy the oxide protective film used to improve the picture effect on the screen surface. Use a special plasma screen cleaner and rag, or just use a chicken feather sweep to sweep away the dust on the screen and body, and do not wipe it with a wet towel or an ordinary towel to avoid leaving hairs on the screen.

1. The most common reason is that the power supply voltage of the TV is unstable; Second, if the power supply voltage of the TV is normal, and there is no problem with the input of the signal source, the reason for the TV flickering is hardware damage; 3. If it is not a power supply voltage problem, consider the problem of the TV signal source, and the abnormal input of the signal source will also cause the TV screen to flicker all the time. Suggested solutions: 1. Try to switch to another program, if multiple programs have flickering problems, you can also use the ***** to detect the signal source again; 2. Among the many hardware of TV, the failure of the motherboard, picture tube and other components is most likely to cause the TV to flicker, therefore, when investigating the cause, we should focus on the troubleshooting of these parts, once the damaged parts are found, the new ones need to be replaced in time, otherwise the problem of TV flickering will always exist; 3. Check the power supply voltage of the TV.

It is not a waste of time to troubleshoot other factors only after this factor has been ruled out. Although the possibility of this situation is indeed very small, it is still very necessary to understand some basic maintenance knowledge. Because the current LCD TV and the traditional old-fashioned TV in the past, it can be seen that its technology is more precise from the comparison of the first and the manufacturing process,Non-professionals recommend contacting after-sales personnel for door-to-door maintenance。