It is impossible to imagine a modern apartment or house without video and audio equipment. This equipment is used every day and therefore breaks down more often than others. There are several ways to repair TVs: send the technician to a service center, call a qualified technician at home, or do it yourself.
Diagnose a TV breakdown
Before you start repairing your TV, you first need to make sure what the problem is. This will also help if you do the repair yourself, and then when the master comes, you can explain the situation to him.
There are several types of malfunctions that can most often be found when a TV breaks down.
- The technique does not turn off. In independence, a picture tube TV or a modern LCD model has broken down, this malfunction is associated with a blown fuse. Only here different models have distinctive details from each other. You should also pay attention to the diode bridge - perhaps it was he who burned out.
- Both in domestic and imported models, the potential can often go astray, for the function of which the posistor is responsible.
- If the plasma TV monitor is broken, then the problem, most often, is interference or drops, light or dark stripes may appear, color changes while watching a program or movie.
- The problem may be a breakdown of the cord or malfunction of the outlet.
If we take into account all the troubles listed above, it is worth saying that the most difficult breakdown is a screen malfunction. For example, light reflections appear on your monitor after the liquid hits the matrix or the TV is hit, then it is better to carry it to the teleservice. Here it will certainly be repaired, and if the warranty period has not expired, then it will be free or at a reduced price.
See also - What to do if the TV does not turn on?
LCD screen - the nuances of repair!
You can try to fix some malfunctions of TVs yourself. And it doesn’t matter here - it’s an LCD model, LCD or LED, it’s not necessary to call a wizard if you are confident in your abilities. But caution never hurts, because such TV models are not cheap, and without experience in repair or knowledge in this area, you can only harm and aggravate the breakdown.
Before you start repairing LED or LCD TVs, you must carefully read the instructions, and also study the principle of operation of your model. Anyone who is even far from this area will understand that the repair of such televisions as LCD or LED will be different from the picture tubes.In the latter case, you are guaranteed not to encounter a faulty posistor. The main thing here is to identify the problem, why does the backlight not work?
If you are repairing LCD, LED models, then the difference here will only be what kind of backlight is applied. If this is an LCD TV, then backlighting is done using fluorescent or fluorescent lamps. For TVs, LED backlighting is done using LEDs. At this stage, the differences between the LCD models usually end.
What is the cause of LCD TV malfunctions?
Failure can only consist in the fact that there is no power, to check this on the LCD TV, you can do the following with your own hands:
- open the back cover of the model;
- remove the wires connected to the matrix;
- connect the working lamp to the contacts;
- there are also such LCD models in which more than one light source is provided. In this case, all sources must be tested. Just dismantle the matrix and connect your TV to the network - you can see which LED is the problem.
When a broken lamp is detected in the LED or LCD TV, it is necessary to replace it. This stage requires maximum accuracy from the master, as well as special attention. In some cases, the lamp is removed without removing the matrix, you only need to move the protection elements with a rubber gasket and pull out the lamp with a soldering iron. Similarly, it is necessary to mount a working light bulb. Now you can be congratulated - you yourself made repairs to the LCD TV! Just pay attention to one important nuance - the new bulb must fully meet the parameters and dimensions of the broken!
To repair TVs yourself, look carefully at the matrix! If there are "unhealthy" bands, then the breakdown is in the matrix. Have a new part? Then everything is simple! You change it and turn on the TV, if it works, then you have definitely identified the breakdown.
If the cause of the failure of the LCD TVs is the screen, then it is best to purchase new models of LCD or LED technology. Changing the LCD screen and LED models is not recommended, as it is impractical! This also applies to the LCD matrix.
What could be the problem with plasma TVs? If you need to repair plasma TVs, then follow the same procedure as described above. Just adapt it to your specific case. This description can be used for any model of plasma TV, just stock up on the necessary tool in advance.
See also - How to choose a TV for home in 2018?
We repair picture tubes models
Although today, most users prefer to use plasma, but many still watch programs on more obsolete picture tubes. Let's find out how to troubleshoot such TVs. Below is a step-by-step instruction that will help you repair your electron beam product yourself.
- If you do not turn on such a device, first of all, check the fuses. In such televisions, the back consists of panels. Therefore, you need to unscrew that part of the panels. Under such panels you will find a board and you need to connect the power terminals to the fuse. They are connected to a conventional incandescent lamp, or rather to its base, after which the TV needs to be connected to the network. In the event that your equipment is in good working order, the lamp will go out after being turned on, otherwise, when the fuse is blown, it will either not work at all or will be constantly on.
- The diode bridge may also break. It should only be taken into account that it is necessary to regulate and repair it only after making calls. In this case, not only a multimeter is used, but also the product passport, which indicates the main parameters of this model.
- The most difficult failure in a TV with a kinescope is a posistor.To do the test yourself, you must first turn off the power circuit, and then turn it on. In this case, you must monitor the lamp. If the working lamp goes out, then it can be said that the resistor is faulty. To make repairs, you need to adjust the network resistance and only venture to change this part.
But not only the matter may be in the posistor, in kinescope models transistors and capacitors burn out. Diagnosis of this failure can be done visually. If the condensate turns black or cracked, then we replace it with a working analog. Now you know why the TV does not work and how to fix it yourself.
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A good article and the author can agree that, in principle, you can diagnose and repair the TV yourself, if you have time, desire and opportunities, and most importantly, your hands grow out of your shoulders (just kidding). In principle, the cost of repairing a TV, now varies from . Therefore, if you yourself are not at odds with a soldering iron and a voltmeter, contact the professionals, who are now in sufficient numbers in Orenburg.