Sony LCD TV is dark in the middle of the screen when it is first turned on after a long time

Sony LCD TV is dark in the middle of the screen when it is turned on for a long time:

Liquid crystal display, abbreviated as LCD (liquid crystal display). LCD, the full name of "liquid crystal display", translated as liquid crystal display, referred to as "liquid crystal display". Liquid crystal is a substance between solid and liquid states, and it is an organic compound with a regular arrangement of molecules, and if it is heated, it will appear in a transparent liquid state, and when it is cooled, it will appear in a cloudy solid state of crystalline particles.

It is precisely because of this property that it is called liquid crystal. The molecular structure of the liquid crystal used for liquid crystal displays is similar to that of a thin matchstick, and it is called Nematic liquid crystal, and liquid crystal displays made of this type of liquid crystal are also called liquid crystal displays (LCDs). The LCD TV is in the liquid crystal between two glasses, add voltage, through the molecular arrangement changes and zigzag changes to reproduce the picture, the screen through the collision of electrons, create a picture, and form a picture through the perspective reflection of external light.

The LCD screen used for LCD TVs has been TFT-LCD CCFL cold cathode fluorescent backlight in recent years. That is, a tube similar to a fluorescent lamp is inside. And then set off through the backlight panel!

Then after two years, some of these lights will age, which is the common fluorescent lamp in our home The middle part will have a feeling of black and not bright, and the brightness will rise again in about 10 minutes.

This situation is not very easy to repair. Generally, after-sales only recommend that you change the LCD screen!

Summary. The reasons for the dimming may be the following, please refer to:1

Generally, if there is an area of the TV that becomes black or an area is darkened, it is very likely that the row of light bars in the corresponding position is broken, because the light bar is the key element that the TV can shine normally, as for a light bar is broken or a row of light bars is broken, the specific reasons need to be analyzed after turning on the TV, generally use the lamp tester to check, use the electric pen of the lamp meter to poke the positive and negative poles of each light bar, if you poke a light bar The electric pen is not bright, then the one that is poked is broken. 2.If the TV high-voltage board is broken, there is an area of the TV that becomes black or there is an area that is darkened, and it may be that the high-voltage plate of the panel part is broken,Because a wire of the high-voltage board is connected to the light bar on the back,If the high-voltage board is broken, it will lead to insufficient voltage power supply and cannot support the luminous operation of the light bar,This also needs to open the panel part of the TV and check it with a voltage tester。

Hello dear, are you all the screen darkened or a part?

The reasons for the dimming may be the following, please refer to:1Generally, if there is an area of the TV that becomes black or an area is darkened, it is very likely that the row of light bars in the corresponding position is broken, because the light bar is the key element that the TV can shine normally, as for a light bar is broken or a row of light bars is broken, the specific reasons need to be analyzed after turning on the TV, generally use the lamp tester to check, use the electric pen of the lamp meter to poke the positive and negative poles of each light bar, if you poke a light bar The electric pen is not bright, then the one that is poked is broken.

2.The TV high-voltage board is broken, there is an area of the TV that becomes black, or there is an area that is darkened, and it may be that the high-voltage board of the panel part is broken, and the high-voltage board is high, because a line of the high-voltage board is connected to the light bar on the back, if the high-voltage board is broken, it will lead to insufficient voltage power supply, and the rising clear cannot support the luminous operation of the light bar,This also needs to be checked by the panel part of the TV with a voltage tester。

Hello,It's a pleasure to serve you,For the sake of quietly, you have made the following answers:The contrast fading after Sony TV is turned on is a common problem,It may be caused by improper blocking of the TV's socks or a problem with the TV's power cord。 Reason:

1.Improper setting of the TV: The setting of the TV may affect the contrast of the TV, and if the slag is not set properly, it may cause the contrast of the TV to fade.

2.Problems with the power cord: If there is a problem with the power cord, it can cause the contrast of your TV to fade.

Workaround:1Check your TV's settings:

Check your TV's settings to make sure they're set up correctly so you can get the best contrast. 2.Check the power cord:

Check the power cord to make sure there are no issues with the power cord so that you can get the best contrast. Personal Tips:1

Check your TV's settings regularly: Check your TV's settings regularly to make sure your TV is set up correctly for the best contrast. 2.

Check the power cord regularly: Check the power cord regularly to make sure there are no issues with the power cord for the best contrast.

Summary. Sony TV is half dark and half bright.

Hello dear,Sony TV is bright on the right and dark on the left。

Sometimes there is a situation where the right side of the screen is bright and the left side is dark, which means that the light tube is not fully lit, but only lit up. The reason is that the high voltage sent by the high-voltage plate is not enough, which is far lower than the voltage of the phosphor in the activated lamp, and then the phosphor near the high-voltage position will light up first, and the part that is fast away will be completely dark. Hope it helps.

Sony TV is half dark and half bright, hello dear,Sony TV is bright on the right and dark on the left, and sometimes you will encounter the situation that the right side of the screen is bright and the left side is dark,This pants search is that the light tube is not completely lit,Only light up points。 The reason is that the high-voltage celery sent by the high-voltage plate is not enough, and Hu Shouli is far lower than the voltage of the phosphor in the activated lamp, so the phosphor close to the high-voltage position will light up first, and the part that is fast away will be completely dark. Hope it helps.