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.
Diagnosing 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 broken cord or a faulty 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, after a liquid hits the matrix or a TV hit, light reflections appear on your monitor, then it is better to carry it to a teleservice. Here it will definitely be repaired, and if the warranty period has not expired, then it will be free or at a reduced price.
See also - What if the TV won't turn on?
Liquid crystal screen - the nuances of repair!
You can try to fix some malfunctions of TVs yourself. And it doesn't matter here - these are LCD models, LCD or LED, it is not necessary to call the wizard if you are confident in your abilities. But caution never hurts, because such TV models are not cheap, and without having 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, even far from this field, will understand that the repair of TVs such as LCD or LED will differ from CRT models. In the latter case, you are guaranteed not to run into a faulty PTC thermistor. The main thing here is to determine the problem, why does the backlight not work?
If you are repairing LCD, LED models, then the only difference will be in what kind of backlight is used. If it is an LCD TV, then the backlighting is produced using fluorescent or fluorescent lamps.For TVs, LED backlighting is produced using LEDs. At this stage, the differences between LCD models usually end.
What is the cause of LCD TV malfunctions?
The breakdown can only consist in the fact that there is no power, in order to check this on an 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 LCD models in which more than one light source is provided. In this case, all sources must be tested. Just dismantle the matrix and plug your TV into the mains - you can see which LED is the problem.
When a broken lamp in an LED or LCD TV is identified, it must be replaced. This stage requires maximum care from the master, as well as the manifestation of special attention. In some cases, the lamp is removed without removing the matrix, you just need to move the protection elements with a rubber gasket and pull out the bulb using a soldering iron. Similarly, it is necessary to install a working light bulb. Now we can congratulate you - you have made the LCD TV repair with your own hands! Just pay attention to one important nuance - a new light bulb must fully meet the parameters and dimensions of the broken one!
To repair TVs yourself, look carefully at the matrix! If there are "unhealthy" streaks here, then the breakage 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 accurately identified the breakdown.
If the reason for the breakdown of LCD TVs is the screen, then it is best to purchase new models of LCD or LED equipment. It is not recommended to change the screen of LCD and LED models, as it is impractical! This also applies to the LCD matrix.
What could be the problem with a malfunctioning plasma TV? If it is necessary to repair plasma TVs, then proceed in the same way as described above. Just adapt it to your specific case. This description can be applied to any model of plasma TV, just stock up on the necessary tools in advance.
See also - How to choose a TV for your home in 2018?
We repair CRT models
Although today most users prefer to use plasma, many still watch programs on more outdated CRT models. Let's find out how to repair a breakdown in such TVs. Below is a step-by-step instruction that will help you repair your electron beam product with your own hands.
- If you do not turn on such a device, check first of all the fuses. In these TVs, the back is made up of panels. Therefore, it is necessary to unscrew that part of the panels. Under such panels you will find a board and the power terminals must be connected to the fuse. They are connected to a conventional incandescent lamp, or rather to its base, after which the TV must be connected to the network. In the event that your equipment is in good working order, the lamp will go out after switching on, otherwise, when the fuse has blown, it will either not work at all, or it will constantly burn.
- The diode bridge can also break. It should only be borne in mind that it is necessary to regulate and repair it only after making a dial. In this case, not only a multimeter is used, but also a product passport, which indicates the main parameters of this model.
- The most difficult breakdown in a TV with a kinescope is a posistor. To do it 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 posistor is faulty. To make repairs, it is necessary to adjust the resistance of the network and only ventures to change this part.
But not only the matter may be in the posistor, transistors and capacitors burn out in CRT models. The diagnosis of this breakdown can also be made visually. If the condensate is blackened or cracked, then we replace it with a serviceable analogue. Now you know why the TV does not work and how to fix it yourself.
See also:
It's a good article, and we can agree with the author that, in principle, you can diagnose and repair the TV yourself, if you have the time, desire and opportunity, and most importantly, that your arms grow from your shoulders (just kidding). In principle, the cost of repairing a TV now varies from 500 to 4000 rubles. Therefore, if you yourself are at odds with a soldering iron and a volt-ohm meter, contact the professionals, of whom there are now a sufficient number in Orenburg.