DIY LG TV Repair
Anyone would be sorry to throw out a $ 1,000 TV. Obviously, replacing the matrix is a very complicated and expensive procedure that may not even be used for budget models. Of particular importance is the repair issue in large organizations that have craftsmen on staff. How to repair your LG TV do-it-yourself? This question is increasingly puzzling users, because not everyone wants to resort to the help of specialists. Let's save some money together and discuss the main points.
to contents ↑How to carry out restoration work?
What to do if the TV malfunctions and how to fix it? First, I would like to mention the good old CRT models. The percentage of such devices is still high.
The TV has fuses in its design that save the user from force majeure situations (voltage drops, short circuits, etc.). Therefore, repairs must be started with fuses. In a normal situation, a zero current passes through this component. Craftsmen began to use this feature for their own benefit: it would be necessary to pull out the burnt part and connect a regular 100 W lamp to its terminals. This resistance value will become a kind of current limiter, which will allow the electrical circuit to last a little longer.
Important! In the same way they do when they supplement the circuit with limiting resistors. The lamp in this case is also an indicator that allows the user to understand whether an electric current is flowing.
In a normal situation, the component will blink and go off after turning on the TV Lji. It is worth noting that the performance of the device will go a little in the wrong direction.
What other components should I look for? Let's look at the main situations:
- The diode bridge is out of order. The component is rectifying current. If the circuit experiences voltage drops, one of the diodes may burn out. It even happens that two diodes fail at once, so the breakdown should be determined with the help of “dialers”.
- The resistor fails. The objective of this part is to remove the potential from the cathode ray tube. If the component stops performing its work, a “rainbow” will appear on the TV screen. In this case, a thermistor or an inductive loop can burn out. In this case, just turn off the power and use the tester to fix the problem.
Do-it-yourself kinescope TV repair is the most common replacement for burnt components, but what about modern models?
to contents ↑Doing the repair right
Do not forget about the general instructions. It is advisable to dismantle the main board in order to avoid the likelihood of electric shock. First you need to discharge the electrode of the EL tube.
Important! When restoring work, be careful not to touch the metal parts.
This component is located in the area of the rubber gasket:
- Use a screwdriver to pry off the gum.
- Swing the component and remove the EL tube electrode.
- Touch the core of the device, thereby discharging the part. If you can find land, then it is better to use it. The most ideal option is a European-type outlet, into which the terminals are correctly connected.
- When discharging, you should hear characteristic clicks. Discharge the component until you stop hearing them.
- Each TV has a main board, which is engaged in the "management" of technology. Remove this part and inspect the radio components on the circuit board.
- Replace swollen capacitors, resistors, and burnt out elements if necessary.
Important! If you still haven’t been able to repair your TV yourself, it’s probably time to replace it with a new and improved model. In our separate review you will find out which brands of TVs better.
LCD devices
Do-it-yourself LCD TV repair - the screen does not light. This problem can be solved if you know the general principles.
Cases of failure of such a technique are slightly similar to those described above for CRT models. Obviously, there are hardly any posistors here, so you only need to establish the reason for the backlight to fail. Typically, these televisions are classified into two types:
- Based on gas discharge lamps.
- Based on diodes.
Gas lamps have nothing to do with those lamps that hang on ceilings. To check the power, it is necessary to dismantle the back wall and visually assess the performance of the wires that go inside the matrix. To do this, disconnect them from the connector and use the light bulb to check their operation.
It also happens that the backlight is provided by a number of discharge type light sources. In this case, you will need to try to pull out the matrix and turn on the device, looking at which particular lamp does not work. If a failed component has been found, then it will need to find a replacement.
Important! Choose accessories that match your TV model.
In some models, in general, you just need to get the lamp from the end without dismantling the matrix. The conductors are located on both sides and are covered with a special protective gasket, which needs to be slightly pushed aside. The bulb is evaporated and a new component falls into its place.
Important! Also, when installing, take into account the position of the location: lateral or upper. Do not overlook those cases when several illuminators are used in one cell.
If a horizontal or vertical strip flaunts on the screen, then the root of the problem should be sought in the scan electrode. We recommend that you give power to another device that has a working matrix in order to confirm this assumption.
Important! It is irrational to carry out the replacement of crystals in those TV models that are budget. Most likely, it will be more profitable to purchase a new device. You may find a suitable model in our publication “Best 32-inch LED TVs”.
But let's not forget about those cases when the TV is broken, but its matrix is working. Then repair is recommended.
Cable issues
The most common damage is cable problems. Most often it is simply attacked, which leads to damage to the core or even the track on the chip. The digital receiver is made in the form of a small chip with a shielding coating, which is why the assembly is inseparable from the cable connector.
Before repairing such a component, carefully remove the electronic components. Then you should find the glue and soldering iron, returning all the wiring to its place.
to contents ↑Important! When choosing a new TV, do not forget to pay attention to the screen resolution. One of the latest developments is 4K resolution. And by following the link, you will findTV rating 4k.
Stock footage
As you can understand, repairing TVs yourself is not always required, since not all cases will cost you a minimum of investment. But if the costs are relatively small, then the recovery is definitely worth it.
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