How to fix a computer monitor after an impact

Good afternoon friends. The monitor screen is broken, what should I do? It often happens that people damage their computer monitor screen. The same thing can happen with a laptop screen. This can happen for various reasons. We will not describe them. The most common reason is the monitor falling. At the same time, the most fragile of its parts is the matrix (although other parts also break).

In addition, the monitor can be damaged not only as a result of a fall, but simply if you handle it carelessly. For example, accidentally hit him. When the matrix is damaged, users come to the service center most often. So, the monitor may break if:

He fell, including from a small height;
Someone hit him accidentally (or on purpose);
He was pushed, for example, by a cat (or you simply caught him);
Due to carelessness. For example, someone sat on it (if it is a laptop monitor).

Due to any of these cases, the matrix will often become covered with what appears to be cobwebs, colored streaks, or simply a black screen. Of course, most people in this case begin to think, what can be done in this case? Should I buy a new one or take the old one in for repair? Especially when you urgently need to work on the computer.

Remember: monitor size, as you know, can vary. The most common are 17-24 inches. If this is a laptop monitor, then the screen diagonal varies from 11-17 inches on average. There are monitors of larger sizes. For example, my monitor has a screen of 27 inches. At the same time, if it is a laptop, then there is a special price pattern for repairs: the smaller the screen, the more it costs to repair it! Hence, it costs more to repair an 11-inch monitor than a 17-inch one!

The monitor screen is broken, what to do in this case? Repair the old one or buy a new one?

He fell, including from a small height;
Someone hit him accidentally (or on purpose);
He was pushed, for example, by a cat (or you simply caught him);
Due to carelessness. For example, someone sat on it (if it is a laptop monitor).

Remember: monitor size, as you know, can vary. The most common are 17-24 inches. If this is a laptop monitor, then the screen diagonal varies from 11-17 inches on average. There are monitors of larger sizes. For example, my monitor has a screen of 27 inches. At the same time, if it is a laptop, then there is a special price pattern for repairs: the smaller the screen, the more it costs to repair it! Hence, it costs more to repair an 11-inch monitor than a 17-inch one!

Why LCD screen repair is a relevant service

Professional team of repairmen " TV-Masters"

» offers prompt replacement or repair of your TV screen at your service.
Over the last five years, plasma and liquid crystal technologies have firmly established themselves in the consumer electronics market, significantly displacing tube TVs. However, the price gap between them is still quite large, so any resuscitation procedures for failed television receivers at home, or with free “hospitalization” to the company’s workshop, is a popular type of service in the capital
.

It should be emphasized that devices with LCD monitors are quite resistant to prolonged use (unlike their lamp ancestors) and are durable. So what can happen to the screen of an ultra-modern TV panel?

List of the most likely reasons why you may need LCD screen repair:

Damage to the matrix by hard objects, for example, after being hit by a ball, from encountering children's blocks, plastic bullets and other toys. Ardent football fans break screens by throwing improvised objects at them: control panels, glasses, plates, etc.;
The matrix is likely to break due to being under a water shower, which happens due to the fault of careless neighbors on the upper floors;
In practice, we have to deal with such a problem as “dead pixels”. This is not even a breakdown, but a type of manufacturing defect, as a result of which some of the pixels on the screen do not reproduce colors. They look like black or glowing dots. As a rule, each manufacturer of television equipment initially specifies the maximum permissible rate of dead pixels (in percentage terms), which is not considered a reason to replace the screen.

What to do in case of such damage?

What to do if your monitor breaks? What comes to mind in such a situation? Take it to the master. In this case, the degree of damage should be taken into account. If several cracks appear in the corner, and the monitor continues to work, then you can simply ignore these cracks and continue working with it. You can try to carefully coat it with liquid glass; it is quite possible that the cracks will become less noticeable. If this is a grid on the screen, then in any case you need to take it to the master. Again, this depends on the extent of the damage.

If you urgently need to work on your computer, you can connect an LCD TV during repairs. If you set it up well, you will hardly notice the difference. Check the inputs of your TV and system unit. If there is an HDMI input on your TV, then you can safely connect it. The same applies to the DVI input. New TVs have quite high definition, and you will even be comfortable reading on such a TV.

If the display is cracked

Cracks on the outer glass violate the integrity of the matrix, and the gas mixture freely leaves its “reservoir”. Such a malfunction cannot be repaired. There is only one way out - buying a new matrix.

Important! The matrix of the device costs almost the same as the TV itself, so most often it’s easier to buy a new TV.

Experienced users recommend not to repair plasma panels, which are home theater components and do not have any audio output devices or other useful components. This case will definitely require purchasing a new panel. But if a plasma TV with a huge range of functions is broken, then it will be possible to speculate. But you should understand that only in 1 out of 5 cases will it be profitable to carry out repairs.

Therefore, immediately read the rating of the best 40-inch LED TVs; perhaps you will decide that buying a new TV will still be more profitable.

Important! Remember that the quality of any device largely depends on the brand and where the device is assembled. Find out where TVs of different brands are assembled.

Damage to the system board

I would like to add that if colored stripes appear on the monitor screen, this does not mean that it is the monitor that is broken. The reason may also be in the motherboard. Therefore, if there is no visible damage on the screen, try connecting it to another computer. If it works, it means the system board is damaged, and we take the system unit to the master.

Please note that when my motherboard was damaged, the picture looked similar to this photo!

Most likely, in this case you will have to buy a new motherboard. If one like yours is no longer on sale (it has been discontinued), then you will have to buy a processor, operational boards (optional) and so on along with the motherboard.

How to properly care for your new mobile

The first thing a happy owner of a smartphone should do after purchasing it is to protect it from possible bumps, falls and other annoying surprises with disastrous consequences. Fortunately, there is a wide range of necessary items on sale and sellers will be happy to advise you on what to buy and how to use it. Available on the market:

protective glasses and films
cases in the form factor - cover and book
bumpers

Screen protectors are designed to protect not only the screen, but also other surfaces of the phone. Their advantage is their low cost, ease of installation and the ability to adjust the shape. Disadvantage: short service life and low level of protection.

A much more effective way to protect the screen is overlay glass, which is glued with a special gel to the smartphone screen and absorbs all the impact, leaving the phone’s display literally untouchable and at the same time transmitting it to the sensor. Unlike film, glass cannot be cut to the desired shape - it is extremely hard and fragile, so it is important to choose one that is suitable for a specific model, otherwise you can get into trouble by sealing the camera or speaker. It is not difficult to install the glass yourself - it comes with alcohol-based wipes for cleaning the surface, which should be used to bring the smartphone screen clean to perfection, after which they remove the film from the glass and, using a wave-like motion, squeezing the air out, stick it in place. If it doesn’t work out, it’s okay, you can peel it off by picking it up by the edge and repeat the previous procedure. Sometimes it happens that it is not possible to squeeze out all the air - in this case, you should purchase additional glue and re-glue the glass with it.

Chinam monitor themselves

Of course, you can fix the monitor yourself. In this case, you will not have to pay for repairs. But, at the same time, you need to have basic knowledge about the design of the monitor. At the same time, you can buy a used matrix of your model, which will be cheaper.

Attention: if you decide to replace the matrix yourself, try to carefully select the parts. Especially regarding their sizes, pin and others.

Useful tips for replacing parts yourself:

If you don't understand exactly how to disassemble your monitor, try looking for a video of repairing a monitor of your model (or similar);
You can start looking for a suitable device model in Avito or a similar resource;
It is still advisable to choose the same matrix model as yours.

I would like to add that although you think that it is the matrix that is broken, it is still worth checking the connection cable. Very often it moves away and the screen turns black. Although the computer boots. This can save you a lot of hassle! If the failure is in the monitor itself, I advise you to connect the TV while it is being repaired.

Conclusion: if your monitor screen breaks, you know what to do. I would still advise taking it to a service center. There, the technician will quickly identify the breakdown and explain what will be cheaper, repair or purchase of a new monitor. Good luck!

Let me remind you that if you have problems with your computer, then it is advisable for you to fill out the feedback form or simply follow the link ====>

Source

Matrix for Samsung TV: step-by-step instructions for replacing it

Each manufacturer uses an individual type of matrix for their TVs. There are three types of matrices: TN, IPS and VA. Most companies use VA and IPS matrices, since they are advanced models. They have excellent image quality, an excellent color palette and a good viewing angle.

However, these models are also prone to breakdowns. Damage to the matrix occurs due to improper and careless handling of the equipment. The screen needs to be looked after regularly, its surface should be cleaned with a soft cloth, and no detergents or disinfectants should be used.

The well-known company Samsung uses most types of matrix in its production. One of them is the ltf320ap08 type. If it does break, then you need to try to restore or replace it. First, we purchase the correct matrix that is suitable specifically for your model, and then we begin the repair.

Step-by-step matrix replacement:

Disassemble the TV. You need to separate the front panel of the TV from the back. The housing is connected with self-tapping screws that need to be unscrewed with a screwdriver.
Place the matrix on a soft surface.
Disable all loops. This must be done very carefully so as not to damage the special fastenings of the cable. In this case, adhesive tape is applied to the surface of the joints.
Remove the matrix.
Connect a new element.
Reassemble the device body in reverse order.

After all the work done, you definitely need to coordinate the matrix with the TV using the remote control. If this does not happen, you need to make certain settings by entering the TV menu.

What could be broken

There are many reasons, and they vary in degree of complexity. From a broken matrix to a faulty inverter.

The monitor turns off when turned on;
Doesn't turn on;
Stripes on the screen;
Turns off after a few minutes of operation;
During operation it makes different sounds and turns off.

Visual inspection

This is one of the main factors for good diagnosis. Pay attention to the power cord, is it OK? Are there any damage to the insulation or severely bent sections of the wire? After opening the power supply and monitor, you need to carefully inspect all the insides of the device. Pay special attention to any bulging capacitors, charred resistors, or poor solder contacts.

If the monitor has deep cracks as if from an impact, and it does not turn on, this means that the matrix is most likely damaged. In this case, repairs are practically not cost-effective, the price of a new matrix is most often equal to 70% of the cost, and there are very few donors.

An example of a broken matrix. Repair is not cost effective.

How to replace a TV screen in Moscow

LCD screen or matrix

- the largest and most expensive part in the design of a TV, which accounts for 50% of the cost of the entire device. In some cases, it makes sense not to replace a broken screen, but to buy a new model. First of all, this applies to outdated inexpensive TV broadcasters.

The matrix, as a rule, is subject to any damage very often. It could be broken by children, the TV might fall, or water might somehow get on the screen. If stripes or some stains appear on the screen itself, it will not be entirely easy to remove them. The best thing to do is simply replace the matrix on your TV. This process cannot be called easy; the part itself is very expensive, since it is the main and important part of the TV.

How to disassemble the monitor

Most monitors are attached with bolts, but some can only be opened through clips. Therefore, before disassembling it yourself, search the Internet for the model of your monitor and a disassembly manual so as not to accidentally damage it.

Safety precautions

After disassembling the monitor, do not touch the parts and contacts on the back of the board. First of all, pay attention to electrolytic capacitors. They can be charged to dangerous voltage levels, despite the fact that they are visually intact.

Using a multimeter in DC voltage mode, measure it on the capacitors. If the voltage on at least one electrolytic capacitor is higher than 0, it must be discharged.

If you find that only the fuse has failed, this is not a reason to immediately change it and connect the monitor to the network. Check all board components for fault. Before connecting to a 220 V network, connect a 40 W incandescent light bulb through the plug. It will act as a fuse. If the monitor is faulty, the light will light up and bridge the short circuit.

Faulty capacitors

Several swollen electrolytic capacitors. A typical and popular malfunction of switching power supplies.

Because of this, the power supply does not start.

After replacing it with the same new parts, the power supply works again, and with it the monitor itself.

We disassemble the monitor, and the first thought is that it could be faulty electrolytes. And in fact, this is also a fairly typical malfunction, which is associated with drying out capacitors. Their capacity is not enough for normal operation of the power supply.

Power supply 715g2905-1. Visually it doesn't seem to have any problems. The power supply may go into protection due to faulty lamps, so let's first rule out their malfunction.

Disconnect the lamps from the power supply and try turning on the monitor. Naturally, you need to follow safety rules. And do not forget that you do everything at your own peril and risk.

By the way, do not forget to write down the connection points of the lamps. And usually the connections of wires from the lamps to the board are shown on the board itself.

If the monitor light is still blinking and you hear beeping or similar noises, then this is most likely a faulty electrolyte.

Discharge the high voltage filters before doing anything further. Their high voltage is very dangerous. Therefore, it is better to play it safe and defuse them.

But how can you understand which capacitor is faulty if there are visually no swelling or leaks? Here you will have to measure them in a row, or unsolder each one and measure its ESR.

As a rule, large containers dry out. If the capacitance has become 40% less than stated on the case, then this capacitor must be 100% replaced.

In this case, it was necessary to change capacitors C922 470uF 15V and C923 1000uF 16V.

Visually they are intact, without swelling or damage.

Before soldering, discharge all capacitors again. You can only replace faulty ones with new ones so that the fault does not appear again for a long time. Preferably with the same parameters. The main thing is no less in terms of operating voltage and capacity.

In general, you can also install capacitors at 25V, but nothing more.

We check the work.

Backlight repair

A SAMSUNG GH19LS monitor being repaired with the problem “turns off after a couple of seconds of operation.” The first thoughts arise about the power supply.

Apparently, the monitor has already been repaired since the electrolytes have been replaced. In addition, one of them clearly did not have enough height of the terminal and it was “extended” with a wire. The capacitors are at the wrong voltage rating. It is better to re-solder to those that are needed.

Lengthy repair process

The problem remains. The monitor does not turn on. Next you need to diagnose the converter part. Since the monitor goes out after a couple of seconds, and the power button itself is lit, this means that the backlight goes out. The problem is either in the lamps or in the transformers. When measuring the resistance of the windings of one of them, it turned out that for one transformer it differs by about 10 Ohms. This is a lot, and the difference in lamp consumption increases, which is why the power supply protection is triggered. The way out of the situation is to change the transformer. But it is not so easy to get.

You will either have to order the same one (which may take months), or exchange two at once for similar ones from donors.

There is another way out. The transformers are from a donor, but I had to put a whole board together with them. To do this, it was necessary to supply power and signal wires separately to them. By the way, when replacing a transformer from a “donor”, one more condition is still necessary - the size of the diagonal of the screen. The repaired monitor and the “donor” one must be the same size (or close) since the lamps are different, the current is different, and the voltage is different.

Donor transformers do not wear out as much as electrolytic capacitors.

Soldering is done in place of the power electrolyte of the new board, and the signal is in place of the cable, where according to the circuit there is a signal to turn on the backlight.

Works. The problem was the increased resistance of the winding of the backlight transformer. This may also be due to the end of its service life.

Debris between the layers of the LCD matrix

It happens that at the factory or during transportation, dust particles or other debris end up inside the matrix between the layers.

Somewhere in my archive there was a photograph of a fly stuck almost in the middle of the screen - it was a factory defect. In such cases, the monitor is successfully returned under warranty.

This happened with a new TV and this is what Samsung technical support responded, according to a participant:

This is what SAMSUNG responded to me:
Hello.
The Technical Department reviewed your request and reported the following:
The display housing has ventilation holes to allow heat to escape from the display backlight elements. Through these holes, insects could get inside the display. This is a TV production technology, like that of any other equipment manufacturer, to ensure the outflow of heat from the display backlight elements. The manufacturer is not responsible for insects getting into the equipment.

Here is a method I found from one of the IXBT forum participants:

You need to take a soft cloth, such as a scarf or sweater sleeve, and lightly hit it on the screen, next to the speck of dust. Dust particles are knocked out, and the risk of damage to the monitor is low. I hit the particularly stubborn ones a little harder - this left faint temporary traces on the matrix, which disappeared after a couple of minutes. The result is that the screen is clean, the monitor is intact and serves its owner well.

And in the same forum thread, people also advised tapping on the sides of the monitor - it also helps to push a speck of dust down, when the layers seem to separate for a moment.

What other problems could there be?

If you have an LED monitor, and there is an image on the matrix when illuminated with a flashlight, then this is a malfunction of the backlight, which consists of lines of LEDs. The case is similar to the one described above, but here you will have to change either the LED lines or faulty ones in the monitor lines.

A similar case, only with a TV, is discussed in this article.

If there are stripes on the monitor, pay attention to the cable from the matrix in the board. Perhaps the contact on the board has become unsoldered, or there is a malfunction in the cable itself. As an option, the wire on the cable can also be unsoldered.

In this article, we examined in detail the typical malfunctions of monitors and their self-repair with examples.

Repair cost

The cost of repairs depends on the availability of parts and their cost. Service centers can charge from 500 rubles for work. A warranty is added to this price, which is usually from 1 month.