Self taught TV repair,Please repair the master in detail!! Three no problems .

According to what you said, it is very likely that the high-pressure package is damaged, or that the row pipe is damaged. Because when you feel numbness in your hands, it is caused by high-voltage discharge, and the discharge will inevitably increase the current, resulting in overload of the high-voltage bag or row pipe and causing damage. Most of the power supply circuits of TVs are switching oscillation circuits, and its sampling voltage is output from the bank.

Due to the damage of the output part of the line, the sampling voltage cannot be obtained, so it cannot be sampled, resulting in no voltage output, resulting in three nos. Secondly, the fuse tube and rectifier tube can be checked, but this part is less likely.

If you only judge that there is electricity based on the electric pen is wrong, the ignition voltage of the electric pen is very low, not to mention that it is AC induction, does not mean that the DC power supply circuit is normal, you should use a multimeter DC block to measure whether the power output has 400V, 30V, 12V and other voltages, it is estimated that there is not. Otherwise, there would not be three nos. In addition, even if the line tube measures the voltage but does not reach the working voltage, it is not possible.

If the local short circuit of the high-voltage package cannot be measured, how to measure the line pipe you proposed, this is a common sense problem. If you don't understand this, don't fix it again, so as not to expand the fault. Be sure to note that some models have hot boards, which means that they will be electrocuted, so don't move them if you don't have a little foundation.

According to what you said, just press the high voltage cap, will not cause three no, I guess you are caused by a short circuit somewhere, with your technology, just the power supply insurance to see if it is broken, otherwise you will make the fault bigger and bigger, or find someone to repair it.

Hold down the CPU with your left hand, and point the high-voltage cap with your right hand haha, you use an electric pen to measure that the entire motherboard has power. If you do this, you will make the fault bigger and bigger, don't go to the sky in one step, start with small electrical appliances, such as radios, amplifiers, read more books on home appliance maintenance, be familiar with the role of those components, be familiar with the use of multimeters, and you will become a first-class teacher in the future.

It is estimated that the pipe is burned, and the most troublesome thing is to be afraid of damage to other parts.

It's not surprising that there is damage to the manifest tube.

Beginners are confused.,I'm from here.,Don't panic.,It's a big deal.,It's a TV.,It's not expensive now.。

There's still a lot to learn, and it's hard to say here. The electric tester can't be used to test TV, and there is electricity everywhere on the hot bottom plate. I want to learn to understand the principle of TV first, and then watch "Home Appliance Maintenance", and improve quickly. Find a master to take it, and tell others how to teach it here.

Go find someone to fix it, you can't fix it, it's about 50 yuan.

You pay 100 yuan for me, and I will help you fix it.

First of all, please ask the landlord to add,Is your TV LCD,Or an ordinary TV。

Judging from what you said, it seems to be an ordinary CRT TV,You can generally hear the sound of the horn,Most of them come from high-voltage places,Your TV I suspect it's a high-voltage cap fire.。 This fault is generally caused by the fact that it is turned on as serious, and the longer the TV is used, the more serious the ignition will be. High-pressure ignition has serious damage to the picture tube and line tube.

It can make the line tube break down, and the picture tube can be discharged with high voltage.

The principle of black screen, let me tell you, high-voltage discharge, the increase of the current of the picture tube speed, will cause the ABL circuit action will cause the TV black screen. Or cause other protection circuit actions (I don't know the model of your TV).

Do not easily do the treatment of the discharge of the high-voltage cap, there is a high-voltage electricity in it that will be shocked. Before treatment, it should be discharged, and then applied to the high-voltage cap with arc extinguisher, and the air in it can be pressed out as much as possible. It is best to find a maintenance person to deal with it, and the general maintenance fee will not be too much.

I think it's either poor contact or leakage of the panel buttons.

It's obvious that it's soldered, mainly the power circuit!

That's the high voltage of your TV that has been ignited,As far as your above problem is concerned,After you buy wow glue,Turn the back of the TV to you,Open the back cover,Remove the high pressure cap,Clean the glue of the high pressure cap,Apply the glue you bought earlier,Just press the high pressure cap。

That's how my TV was fixed.

That's caused by the dampness of your TV,The TV is damp,Make the high-voltage string power,With your above problem,It may be that the high-voltage package is connected,There is no problem if you change the high-voltage package。

The internal components are short-circuited, and the after-sales service is called **, and it is repaired quickly.

Don't keep turning it on. You've had that machine for years, right? This phenomenon may be caused by poor internal contact and power supply or high voltage protection shutdown. You should ask the maintenance master to check it in time. Otherwise, it is possible to damage more accessories.

Tell you a few steps to check, so that you have the bottom of your mind, but this kind of fault must be sent for repair.

1.Turn the back of the TV to yourself, 2It's best to turn off the lights in your home at night and turn on the TV, you should be able to see the spark through the cracks in the TV case.

3.Hurry up and send it for repair, don't do it yourself, it's dangerous.

2 places, the high-voltage cap on the CRT is ignited, or the high-pressure bag is ignited, this problem can not be turned on again, don't expand the scope of the fault, wipe the ignition place with a slightly damp rag, dry it with a hair dryer, coat it with 704 silicone, and replace the broken components, if the CPU or memory is broken, it will be miserable, don't turn it on.