The monitor is super difficult to solve, the hardcore master, please come in!

Halo so many copied from,It's boring to look at.,Let me tell you.,I've done 2 years of maintenance.,I can tell you for sure that there is a bad contact in your monitor.,You open the display wide.,You can easily find the solder joints with bad contact.,Because such a long time of ignition should burn the nearby black.,So you can find the welding yourself.。

You mainly check the connection of the data cable. Graphics card .

There is leakage in the display or in the high-voltage circuit!

It feels like a power supply problem, so it is recommended to change the power supply and clean the motherboard.

Monitors play an important role in our work and life, but their failure rate is not very high in the whole process of computer use. In this article, I will talk about the internal structure of the monitor, as well as the causes and repairs of common failures.

Some time ago, my friend's computer monitor broke down and put it here for me to help me take a look. This monitor is still some years old, and it is still the Ember brand, and the situation of this failure is that the screen goes black after a few seconds after being lit after being connected to the power. Can the audience deduce that the ** is broken?

Explanation of the internal structure of a computer monitor.

Disassemble the display,The first thing you see is a layer of shield,Remove the shield,Basically, there are two parts inside the display on the market,Power board and driver board。

Broken monitor.

The internal circuit board of the display.

The function of the power board is to provide low-voltage power to the driver board, and the second is to provide high voltage for the LED tube, note, it is high voltage.

The role of the driver board is to convert the analog signal from the graphics card into a digital signal that can be displayed on the display.

Fault Symptom Analysis.

The display indicator does not light up after powering on – the power strip is faulty.

After powering on, the indicator light is on, the screen is black, and the display content can be seen by illuminating the screen with a flashlight - the life of the LED tube has expired.

The display indicator lights up black after powering on – the power strip is faulty or the LED tube is damaged.

After powering on, the display turns on for a few seconds and then turns off – a faulty power strip or a damaged LED tube.

After powering on, the indicator light is on, and the display is abnormal (blurred screen, shaking screen, white screen, stripe) - the driver board is bad.

After powering on, the indicator light is on, and the screen has vertical white lines - the hot pressing cable of the display screen is partially off.

Then this monitor of ours lights up after a few seconds of power and then goes black. It is necessary to start from the power board and LED tube. The fault is in the high-voltage drive section of the power strip and the lamp.

I replaced it with a universal power strip and found that the fault was still there, which proved that the fault was on the lamp. Disassemble the display, and sure enough.

Broken LED tubes.

When the monitor is lit, the power strip finds that one of the lamps is disconnected, thus cutting off the power supply and entering the protection state. That's why there is a black screen that lights up for a few seconds.

Answer 11, display common problem 1: there are interference clutter or lines on the display screen There will always be intricate interference clutter or lines on the display screen. This phenomenon is mostly caused by the poor anti-interference performance of the power supply.

Keep the computer away from the source of interference or replace it with a new power source. 22. Common problem 2 of the monitor: the monitor makes a "zizi" sound Start the computer and hear the monitor make a "zizi" sound.

It may be caused by the partial discharge of the internal high-voltage due to dust accumulation and moisture on the display. This phenomenon should not be dealt with by yourself, and should be sent to a professional maintenance point for repair. 33. Common problems of the display three:

There are bright spots in the center of the screen when the computer is turned off. It may be caused by the problem of the display circuit or the picture tube itself, and it can be used, but after a long period of use, the picture tube will burn out, and it can be repaired by replacing the picture tube base, which is generally shown in the following figure, or it can be sent to the maintenance station!

44. Common problem 4 of the monitor: the screen changes from blurry to clear after booting After booting, the picture on the CRT monitor screen is very blurry, and then gradually becomes clear. This condition is a precursor to display aging.

Because the cathode tube in the picture tube can only be shot out after being heated by the filament, but when the electrode tube begins to age, the heating process slows down, so it cannot reach the standard temperature immediately after booting, and can not shoot enough electron beam, resulting in the display screen will not be clear enough. For this problem, it is recommended to contact the dealer or the customer server department of the product for repair or replacement. 55 Monitor FAQ Five:

Magnetization occurs After changing the position of the CRT monitor, a slight magnetization occurs. Some brands of CRTs are sensitive to the earth's magnetic field, so it is recommended to face east when using them, and do not change directions at will when using them, and try to avoid magnetic fields. Once the magnetization phenomenon occurs, the slight one can be degaussed with the help of the manual degaussing function that comes with the display, and the serious one can be processed with a special 6 degaussing tool

66. Common problem 6 of the monitor: The display has a sense of flickering When using the computer, the question of the CRT monitor?

Why can't I send it**.

If you send**, you can choose to buy** consultation, pro.

Ask a question to help you see the monitor parameters.

Why can't I send it**.

You can tell me the relevant model here, and I will check it for you.

If the display fails, you first have to explain your display type, brand and model, because if the display is classified according to the old one, if it is the old kind of big-headed monitor, the content of the maintenance and inspection covered is also different.

When the screen is black, the indicator light does not light up, which means that your monitor is connected to a bad power supply, the voltage is unstable, and when the power is completely off, it is not in the working state, of course, the buttons have no effect, and when the contact is restored to power, it is equivalent to causing a restart self-test. All you need to do is replace it with a new power strip, check the plug of the monitor's power cord, wipe the oxide clean, and you're good to go.

In order to let you know the common problems of the power supply and the reasons why people do not know, I use some efforts to popularize scientific knowledge, and then talk about the cause of the fault in detail: this kind of power supply caused by the hidden deep power supply that is not obvious to people is essentially due to the long-term use of the power supply equipment heated, the power supply board contact copper sheet oxidation, the resulting contact resistance increases, ((when the contact resistance increases, the current has a thermal effect on the oxide, overheating, directly causing combustion, thus causing fire)) The working voltage drops, and the fault caused by instability. The reason for the gap is that when the contact resistance increases, the contact copper sheet overheats, and the thermal resistance increases, and the working voltage obtained by the display decreases until the self-protection is disconnected.

Disconnected for a period of time, the temperature of the original contact copper sheet drops, the resistance drops, ((the resistance of the metal conductor is proportional to the temperature)) At this time, the voltage division of the entire power supply connection line decreases, and the working voltage obtained by the display rises, and it starts again.

In your case, there are also display performance issues here, with device aging causing operating point drift. Just do some debugging, the problem is not big, there is no hard failure, it should not be a big cost to take it for repair.

Check the display button board first, whether the keys are oxidized, open the case, unplug the button board after normal boot to see if the screen will be black, if the screen is not black, it is a problem with the buttons, and then check the power board of the display with a black screen.

LCD monitor It is recommended to replace about 700 maintenance you don't understand It's easy to be deceived, generally after the maintenance is good for two months, and then it costs money to break down, it is better to solve it at one time.

It's expensive to go to the official after-sales service, because after all, people have a lot of employees, and they can't bargain; It is recommended to go to the repair shop, just watch him repair it, if the problem is not very serious, you don't need to change the circuit board or something, just repair the circuit, capacitor and the like, I think it will be done for dozens of dollars. Before I repaired a desktop motherboard for 30 yuan and could be used again, it is recommended that the landlord ask the local repair shop.

It's better to fix it, ask for the price, and buy a new one if it's too expensive.