TV failure, please enter if you know how to repair!

There are two main causes of this failure.

1.The supply voltage is too low. Use a multimeter to check whether the supply voltage is DC 110V. Too high or too low can be adjusted by a potentiometer close to the power circuit. (If the TV is under 21 inches.) It seems to be a potentiometer on the motherboard).

2.The field frequency is too large. Access to bus conditioning is required. This one requires you to provide the brand and specific model of the TV to tell you how to do it.

There are other reasons that can cause this failure but you can't fix it. It is recommended to find a place to repair it. It won't be more than $40.

Cause of failure: This phenomenon is too large.

Solution: If it is a color TV, find the manufacturer and model to enter the digital bus adjustment, if it is a black and white TV, adjust the field frequency knob on the back and adjust the field linear inductance on the circuit board can be solved.

Brother, it seems that you can't save this money There are many reasons for this failure, and it cannot be ruled out that it is a problem with the picture tube Now there are two options: either throw it away or sell it for scrap.

The problem is that the high pressure causes the problem to burn the correction tube, replace the high-pressure package and the correction tube, the problem can be solved, and it can be solved by repairing dozens of yuan by yourself, and the high-pressure package and the correction tube should be the original model, and you should pay attention to safety Haha.

Don't think about it, it's all bus machines now, and there are no adjustable components in it, don't mess around, be careful to burn out the machine.

What you said should be that the output circuit is faulty (or the pincushion correction circuit is more than 21 inches), or call a professional to fix it for you.

Yours is the assembly machine and more. It is recommended that you do not do it yourself. Today's boards are bus-controlled, which means that there are no adjustments like the previous ones. It's better to find a more professional one to repair it for you.

Summary. Do not place magnetic materials such as speakers near the TV to avoid magnetizing the screen. For non-professionals, it is strictly forbidden to open the back cover to clean the dust on the circuit board of the TV, or repair the fault.

When configuring an external speaker for a TV, attention should be paid to power matching. 2. Maintenance of smart TV software system about the use of software. Smart TVs can generally be installed.

Therefore, before the maintenance, for the troubleshooting and machine detection process, here are 8 tips to share with the masters. 1. Every time the TV is turned on for more than ten minutes, there will be various failures, generally the large integrated circuit is soldered, and its pins can be collectively soldered. 2. The TV fails every time it is turned on.

The TV is broken maintenance plan: 1. Check the fault of the TV first, that is, what are the manifestations of the fault. 2. Preliminarily judge the faulty lines or parts according to the fault performance of the TV.

3. Use special tools such as multimeters to detect and troubleshoot the circuits and parts suspected of faults one by one. 4. Determine the fault line and.

TV breakdown repair.

Fellow, I really didn't understand, I can be more specific.

Do not place magnetic materials such as speakers near the TV to avoid magnetizing the screen. For non-professionals, it is strictly forbidden to open the back cover to clean the dust on the circuit board of the TV, or repair the fault. When configuring an external speaker for a TV, attention should be paid to power matching.

2. Maintenance of smart TV software system about the use of software. Smart TVs can generally be installed. Therefore, before the maintenance, for the troubleshooting and machine detection process, here are 8 tips to share with the masters.

1. Every time the TV is turned on for more than ten minutes, there will be various failures, generally the large integrated circuit is soldered, and its pins can be collectively soldered. 2. The TV fails every time it is turned on. Repair plan for a broken TV:

1. Check the fault of the TV first, that is, what are the manifestations of the fault. 2. Preliminarily judge the faulty lines or parts according to the fault performance of the TV. 3. Use special tools such as multimeters to detect and troubleshoot the circuits and parts suspected of faults one by one.

4. Determine the fault line and.

Summary. Kiss,Hello,I'm glad to answer for you,Kiss the TV suddenly no signal:Solution:

This fault is divided into two situations, the first one is powered-on, and there is no input signal; The second power on shows that the excess display appears. (1) When there is no input signal, check whether the signal cable connection is normal; Check whether there is a virtual soldering short circuit in the circuit of the motherboard from the line field input to the inverter output to the main chip; Check whether the voltage of each working point of the motherboard is normal. (2) When the display is exceeded, check whether the computer input signal is out of range; Check the voltage at each operating point of the motherboard.

Kiss <>

I hope my answers can help you and wish you a happy and healthy life!!

<> kiss, hello, I'm glad to answer for you, kiss the TV suddenly no signal: Solution: This fault is divided into two situations, there is no input signal after the first power-on; After the second power-on, there is a display beyond the shirt of the shirt.

(1) When there is no input signal, check whether the signal cable connection is normal; Check whether the circuit of the motherboard from the line field input to the inverter output to the main chip has the phenomenon of virtual soldering, short dull and quiet cavity; Check whether the voltage of each working point of the motherboard is normal. (2) When the display is exceeded, check whether the computer input signal is out of range; Check the voltage at each operating point of the motherboard. Kiss <>

I hope my answers will help you, and I wish you a happy life, good health, and good health!!

<>Second, the TV has sound and no image: Reason: First of all, it is suspected that there is a problem with the high-frequency head, which will directly lead to this situation.

There is also the color system is not adjusted to the pair, and the brightness is not adjusted to come out, and the color system is checked by adjusting the remote control. Solution: (1) After the high-frequency head is damaged, there is no image input, so there is no image display on the TV screen, check whether the relevant parameters of the high-frequency head are normal, and then replace it.

2) Adjust the color system of the TV, which is also one of the reasons, usually this situation is relatively rare. When you turn off the TV, you can see the bright bend of the TV at the moment of turning it off, and there is a little discharge sound, then it can be concluded that the picture tube of the TV is normal.

I'm disturbing Jane's home, the TV is obviously in the shutdown state, pull out the pants, lose the power, and plug it back in, it will turn on itself, and the same power outage in the shutdown state, turn it on after the call, what's going on.

Dear,Hello,I'm glad to answer for you,Kiss is very finger trembling normal function,Most TVs are designed according to such a program:If the power is off after shutting down,The power will be maintained when it is turned on again; If the power is off in the power-on state, it will remain in the power-on state when the power is turned on again. It is the command of the faithful and obedient master, and does not change the state on its own initiative.

Turn it off, unplug it, plug it back in, and he'll turn it on himself.

After plugging in the power supply, the remote control is not activated.

It's normal to kiss you.

There's no one in the house, and there's a sudden power outage, and then when the call comes, he turns it on.

Is this also normal?

Kiss yes. This is set by the manufacturer itself.

Summary. 1. Self-test 1Check whether the TV is plugged in; 2.

Check whether the TV power cord is properly connected; 3.Check whether the TV power kill switch is turned on; 4.Check if the remote control battery is depleted; 5.

Check if the receiver is receiving the signal; 6.Check that the TV socket is not loose. Second, replace spare parts 1

Check whether the TV circuit board is burned out; 2.Check the TV circuit board for open circuits; 3.Check the TV display board for damage; 4.

Check whether the TV transformer is burned out; 5.Check whether the TV power supply IC is damaged; 6.Check the TV program board for damage; 7.

Check the TV remote for damage; 8.Check the TV buttons for damage. 3. Maintenance 1

replacement of burned-out circuit boards; 2.replacement of burned-out transformers; 3.Replace the burned out power supply IC; 4.

Replace the burned-out program board; 5.Replace the damaged remote control; 6.Replace damaged keys; 7.

Replacement of damaged display boards; 8.Check the voltage stability of the circuit board and power supply; 9.Check the heat emission effect of the circuit board; 10.

Check that the current and voltage on the circuit board meet the requirements.

Fellow, I really didn't understand, I can be more specific.

1. Self-test 1Check whether the TV is plugged in; 2.Check whether the TV power cord is properly connected; 3.

Check whether the TV power kill switch is turned on; 4.Check if the remote control battery is depleted; 5.Check whether the receiver receives the hail and the sign; 6.

Check that the TV socket is not loose. Second, replace spare parts 1Check whether the TV circuit board is burned out; 2.

Check the TV circuit board for open circuits; 3.Check the TV display board for damage; 4.Check whether the TV transformer is burned out; 5.

Check whether the TV power supply IC is damaged; 6.Check the TV program board for damage; 7.Check whether the rock control of the TV remote stove is damaged; 8.

Check the TV buttons for damage. 3. Maintenance 1replacement of burned-out circuit boards; 2.

Replace the burned out transformer; 3.Replace the burned out power supply IC; 4.Replace the burned-out program board; 5.

Replace the damaged remote control; 6.Replace damaged keys; 7.Replacement of damaged display boards; 8.

Check the voltage stability of the circuit board and power supply; 9.Check the heat emission effect of the circuit board; 10.Check that the current and voltage on the circuit board meet the requirements.

Hello, I am glad to serve you and make the following answers for you: 1Reason:

The cause of a TV malfunction can be a hardware failure of the TV itself, or it can be a problem with the TV's software. 2.Workaround:

1) Hardware failure: If it is a hardware failure of the TV itself, you can try to check the power cord, power plug, power socket, etc. of the TV to make sure that the power cord is not damaged, the power plug is inserted firmly, and the power socket is not damaged. If there is no problem with the above checks, you can try to replace the power cord or replace the power plug, if it still does not solve the problem, you can try to replace the power socket, or send the TV to a professional repair shop for repair.

2) Software failure: If it is a problem with the TV software, you can try to restart the TV, or update the TV software, if it still can't solve the problem, you can try to reinstall the TV software, or send the TV to a professional repair shop for repair. 3.

Personal tips: (1) In the process of using the TV, you should pay attention to protect the TV and avoid being affected by moisture, vibration, high temperature and other environments, so as not to cause TV failure. (2) In the process of using the TV, you should pay attention to check the power cord, power plug, power socket, etc., to ensure that the power cord is not damaged, the power plug is inserted firmly, and the power socket is not damaged.

3) In the process of using the TV, you should pay attention to regularly updating the TV software to ensure the normal use of the TV.