I just bought it not long ago40Inch LETV TV can t be turned on when the power is turned on, what s g

There is a faint image on the screen, and the sound is normal, but the TV self-test is not successful. I've encountered something similar.,But look closely,After turning on, it looks like the TV is aging,The boot is not successful,That's the phenomenon,The power light is normal,The screen is very dark,It's almost a black screen。 In the end, I simply bought a new TV.

Hello, solve LeTV.

Three ways to solve the problem:

1. Observe whether the LETV indicator light is lit. If it doesn't light up, check if the power cord is plugged in and the power button is turned on. If it is confirmed that it cannot be solved, apply for after-sales on-site inspection;

3. If you can't enter the system and restart it automatically repeatedly, it may be that the data redundancy area is destroyed, please restore the factory settings.

If there is no effect, it will be forced to upgrade, and if there is no effect, apply for after-sales door-to-door inspection and sock testing.

Extended information:The TV indicator light is on and cannot be turned on Reasons for the black screen after powering on:

1. If the power indicator of the TV is off, it means that the power connection of the TV has a problem of destroying the block, resulting in a sudden power failure and a black screen, such as a loose power plug and a faulty power cord;

2. Caused by hardware failure, such as power module.

Fault, short circuit or open circuit of switch circuit, failure of high-voltage board, failure of LCD screen or screen cable, failure of motherboard chip or other components.

Summary. 1. Press the standby button of the remote control to test whether the TV is turned on.

2. Detect whether the screen backlight is bright;

1) Use a light source (flashlight, flashlight) to illuminate the screen and see if there is any bright light on the inner screen;

2) Compare with the screen when the power is cut off, and see if the inner screen is bright.

What should I do if the LETV TV indicator light is on and can't be turned on, and the screen is black after turning it on.

1. Press the standby button of the remote control to test whether the TV is turned on.

2. Detect whether the screen backlight has a bright light; 1) Use a light source (flashlight, flashlight) to illuminate the screen and see if there is any bright light on the inner screen; 2) Compare with the screen when the power is cut off, and see if the inner screen is bright. 3. If the screen is backlit, see if there is a boot logo and boot **; Fourth、If there is a friend's first boot logo、**,It is recommended that you restore the factory settings of the digital TV or force the upgrade。

You can refer to it.

I hope it helps to kiss and kiss.

Summary. The reason why the screen of LETV suddenly went black:

1. First of all, it may be caused by the abnormal power circuit, which is manifested as the button does not respond when pressing the panel, and the indicator light does not light up. One possibility is that there is a problem with the input stage of the power circuit. Another possibility is that the load of 5V is heavier.

2. If the circuit source is normal, then there may be a problem with the circuit driving the backlight.

3. There is no problem with both aspects of the appeal, then it may be that part of the circuit controlling the switch of the high-voltage board on the AD board is faulty.

4. There is also a broken backlight of the screen or other special circumstances.

LETV TV turns on normally, and the screen will be black for a while。

The reason why LETV TV suddenly went black screen:Open and imitate 1、First of all, it may be caused by abnormal power circuit,It is manifested as no response when the keys are pressed on the panel,The indicator light is not on。 One possibility is that there is a problem with the input stage of the power circuit.

Another possibility is that the load of 5V is heavier. 2. If the circuit source is normal, then there may be a problem with the circuit driving the backlight. 3. There is no problem with both aspects of the appeal, and it may be that part of the circuit of the switch on the AD board controlling the high-voltage board is faulty.

4. There is also a broken backlight of the screen or other special circumstances.

The solution to the sudden black screen of LETV TV:1、Observe whether the power indicator of the TV is on,If it is bright and laughs early,You can try to press the standby button of the remote control or press the channel + - button on the fuselage to wake up the TV。 2. If the indicator light of the TV is off, check whether the power plug of the TV is loose and whether the power button is turned on.

You can reconnect the power supply and turn on the power button to test the lead mountain. 3. If the TV still can't be turned on after the above methods are investigated, it is basically caused by hardware failure, mainly due to the failure of the power supply system, internal circuit failure, high-voltage board failure, screen or screen cable failure, motherboard chip and other component failure, etc., you need to contact the after-sales service of the TV to carry out a comprehensive overhaul of the TV to solve it.

Hello, the above is the answer for you, I hope it can solve your problem, do you have any other questions? We're ready to help you out

Summary. Dear,LETV TV power light does not turn on the screen can not be turned on This may be the power cord is broken,Or the screen line of the boot or,LED light bar is broken,The specific reasons are as follows: 、About this problem,If you can't turn on how to restart,Then this problem,First check whether the components in the power input loop are normal,For example:

Power supply fuses, varistors, and anti-interference circuit components, etc. If the above checks are normal, then check the rectifier filter circuit. Check the power factor correction circuit.

Check it out, the secondary switching power supply circuit. Check it and turn on the standby control circuit. If the above inspection is normal, but the power-on test machine is still not good, then finally focus on the inspection, the DC voltage conversion circuit components on the motherboard.

Pro,LETV TV power light does not turn on the screen can not be turned on, this may be the power cord is broken,Or the screen line of the boot or,LED light strip is broken,The specific reasons are as follows: 、About this problem,If you can't turn on how to restart,Then talk about eliminating this problem,First check whether the components in the power input loop are normal,For example:power supply insurance、Varistor,And anti-interference circuit components, etc。

If the above checks are normal, then check the rectifier filter circuit. Check the power factor correction circuit. Check it out, the secondary switching power supply circuit.

Check it and turn on the standby control circuit. If the above inspection is normal, but the power-on test is still not good, then the final key check, the DC voltage conversion circuit components on the motherboard can be.

Normally, I looked at the sudden black screen, and after a few days, I opened the side base for a while, and after watching it for about 5 minutes, the screen went black again, and then it couldn't be opened.

Dear,Normal look at the sudden black screen,Later, a few days later, I opened it for a while,I watched it for about 5 minutes and the black beam hidden screen,I can't open it again,This spring bend kind of situation LED light bar bad may be more slag stuffy,It may also be a problem with the power board。

Summary. LETV TV power light does not light up and the screen can't be turned onHello,This may be the power cord is broken,Or the screen cable that is turned on or,LED light bar is broken。

LETV TV power light does not light up and the screen can't be turned onHello,This may be the power cord is broken,Or the screen cable that is turned on or,LED light bar is broken。

Regarding this problem, if you can't turn on the device no matter how you restart it, then for this problem, first check whether the components in the power input circuit are normal, such as: power supply fuse, varistor, and anti-interference circuit components, etc. If the above checks are normal, then check the rectifier filter circuit.

Roll quietly and check the power factor correction circuit. 、Chunzhi check it, the secondary switching power supply circuit。 Check it and turn on the standby control circuit.

If the above inspection is normal, but the power-on test machine is still not good, then finally focus on the inspection, the main board can pick up the DC voltage conversion circuit components on the sensitive.

LETV TV power light does not light up and the screen can't be turned onHello dear,1、The indicator light of the TV is not on,The reason for not being able to turn on may be that the power cord of the TV is not plugged in or the power button of the TV is not turned on or the remote control battery is dead,The solution is to plug in the power cord,Turn on the power button of the TV and install a new battery on the remote control。 2. Measure whether the CPU power supply voltage is normal under the sun, the traditional power supply is generally +5V, if it is normal, you can check whether the line pushes the triode collector voltage is normal, the new TV line pushes the power supply generally, the posture is taken from the 25V field power supply voltage, which is realized by resistor voltage division, and some are self-supplied, obtained after voltage division through resistance, to see whether the voltage divider resistance fails or the resistance becomes larger. 3. If the voltage divider resistor fails, it usually causes the collector voltage of the line push triode to decrease a lot or there is no voltage at all, and the line output tube does not have a push signal, resulting in the screen not bright, which is more common in summer.

Three ways to solve the problem that the indicator light of LETV TV cannot be turned on and the black screen after boot:

1. Observe whether the LETV indicator light is lit. If it doesn't light up, check if the power cord is plugged in and the power button is turned on. If it is confirmed that it cannot be solved, apply for after-sales on-site inspection;

3. If you can't enter the system and restart it automatically repeatedly, it may be that the data partition is destroyed, please restore the factory settings, and then force the upgrade if there is no effect, and apply for after-sales on-site detection if there is no effect.

Here's how:

1. In the standby state (when the physical switch is turned on and the remote control is turned on), press the remote control up and on button to forcibly restore the factory.

2、Super 3When the remote control standby is in the state,Turn on the TV mechanical switch after powering on,Press [Settings], [Volume Plus], [Channel Plus], [Channel Reduction], [Volume Reduction], [Power On] buttons.

You can also perform the following operations to check:

1. Is the LETV indicator lit? If it doesn't light up, check if the power cord is plugged in and the power button is turned on. If it is confirmed that it has not been solved, please come to the after-sales inspection.

3. If you can't enter the system and restart it automatically repeatedly, it may be that the data partition is destroyed, please restore the factory settings, and then force the upgrade, or not, please come to the after-sales inspection.

In standby mode (when the physical switch is turned on and the remote control is turned on), press the remote control up and on buttons. Forced factory reset. -In the super 3 remote control standby state (turn on the TV mechanical switch after powering on), press [Settings], [Volume Plus], [Channel Plus], [Channel Down], [Volume Down], [Power On] buttons) in turn).

The most garbage TV in history is LETV TV,Consumers must not buy it。 I have bought two LETV TVs,Black screens appear,After-sales service**,According to their methods, I got it all kindly,It's not good,Say it's to ask me to come to the door after sale,I have to pay the door-to-door fee,It's all said to come,As a result, how to wait**Don't come。 Not only TV garbage, but also after-sales service.

Apply for after-sales service and let them repair it for you.

The reason can be that the power supply of the TV is loose and falls off or the contact is poor, which can be re-reinforced or replaced with a power socket to try to solve; The reason may be that the power supply of the TV is disconnected, which can be solved by reconnecting the line or replacing the power cord; The reason may be that you have accidentally touched the standby button of the TV, which can be solved by pressing the standby button of the remote control to wake up the TV; The reason may be that the TV cannot be turned on due to the failure and damage of the TV hardware, which is an equipment failure, and ordinary people cannot solve it by themselves, so they can contact the TV merchant to apply for repair and resolution.

Tips for maintaining your TV:

1. There is a magnetic field around the TV, so do not place magnetic objects near the TV or carry strong magnetic objects to move near the TV, which will affect the normal operation of the TV.

2. When turning off the TV, develop the habit of turning off the TV first and then turning off the power, and cutting off the power directly will shorten the life of the TV.

3. Don't put a shield on the TV, the TV needs to dissipate heat during operation, and covering it with objects will affect the heat dissipation of the TV and shorten the life of the TV.

4. When it rains and thunders, it is better to turn off the TV and cut off the power to avoid accidental lightning damage to the TV.

5. The cleaning of the TV can only be wiped with a clean soft cloth, and it cannot be cleaned with a water-soaked rag or partial repentance alcohol, which will damage the equipment.