- 1 Why not turn on the TV
- 2 Do not turn on the TV: causes and repair
- 3 Why not turn on the TV: 4 ways to fix the problem
Why not turn on the TV
Why is the TV no longer included. Answer Question! Wondered why most sensors of old appliances mechanical? Today, irons, electric kettles, oil heaters, washing machines, refrigerators often go without sophisticated electronics. Nature by the human mind, created a lot of sensors. Known: pressure depends on temperature - a principle action thermostats refrigerators. Note, all trying to do a 230 V single phase at each house in the socket. Sophisticated electronics requires careful treatment. Guess why not turn on the TV? Start studying pulsed power supplies.
TV refuses to be included
Make sure the integrity of the Internet. Today TV is updated at night. Do not disturb the process. Change is better for downloading the update.
TV contains a lot of electronics, for various reasons is unable to eat the stuffing at 230 volts AC. From considerations of size, characteristics of the operation lamps require a filament voltage of 6.3 volts (sometimes AC magnetron microwave ovens). For other electrodes, p-n junctions of semiconductor devices. These items can not withstand high currents due to small size, limited power dissipation. Each TV starts a switching power supply.
The adjective indicates transformer operation. First television deprived of pulses. The windings are formed of solid wire, steel transformer core was the lion's share of the weight. Imagine whopper cram into a modern LCD monitor. Reduce other chips. Step is possible by further reducing the supply voltage. To reduce the current, reducing power dissipation. Over the processors were the same manipulation, increasing the number of transistors bullied current consumption, making it an incredibly great computer brain consumes more "light bulb Ilyich."
Thus, the application of pulsed power supplies is justified. Most of the secondary windings of half a dozen normal operation electronics requires a number of denominations. Remember the system unit of a personal computer.
Consider the principle of operation of pulsed power supplies.
Switching Power Supply TV
Pulsed power supply unit begins to filter saves stuffing Surge voltage externally. Precautionary measure device saves partly are other security features. The varistor, the power supply at the input of the pulse generator, voltage spikes on closing the housing. After the filter is worth rectifier. Most often the bridge formed by four diodes, easily distinguishable from the other components. Some cards from the back, the front of the schematics labeled icons (triangle with a cross on top of the feature). The following well-distinguishable power cell. Whatever key:
The main thing to have available a control electrode. The power element is easy to find: has a massive radiator. This is exactly the case when the electronics operates at 230 volts. For this reason, a key element of the road, solid and durable. It is clear now that the TV is not collected. There is a chip-fueled (albeit through a zener diode), the input potential difference. The pulse generator with a key slicing rectified voltage frequency of 50 Hz high frequency sequence. Deliberate step possible to reduce the size of the transformer.
Driving pulse power supplies
On the pulser entrance stands a zener diode, which forms the supply voltage, the varistor shorted to ground. Voltage comes front, closed protective element. As a result, the varistor can be burned as the other component. Following the key should be a transformer, each of which need winding vyzvonit. For example, the feedback with a pulse generator is sometimes left hinge. Ratings discussed above. For each individual coil.
Yield formed Schottky diodes. Used for the unique quality - small voltage drop open p-n junction. Power dissipation is reduced. The output of low pass filter smooths remaining pulsations. The simplest capacitor is presented. Members interested cause necessity twice rectifying voltage transformer ... A direct current does not pass. Circuit means narezhet key pulse sequence that causes a response other. The outlines of the signals are similar. Consequently, the tension needed to straighten. Winding lowering. Voltage of 230 volts is much smaller. Discuss how to fix the TV.
Fix switching power supply
It is not recommended to include a defective TV power unit as further progress is possible internal injuries scheme. If there is a need, first check the fuse. Frequently in household appliances is replaced by an element of a piece of wire, no TVs. The fuse is burnt when the circuit has large damage. If burned, do not hurry to rejoice. Instead fuse Ilicha turn lamp power of 150 watts.
Now carefully turn on the power, unplug the power cord. Lamp blinks and turns off. Burning, light indicate the need for further research breakage. Begin by visual inspection:
- Swollen capacitors. In electrolytic tanks cylindrical shape is cut by the upper bound of the crosspiece. Bulging sidewall means the product needs to be replaced.
- Visually burnt elements. Even if a resistor is not completely burned, functions better replaced with a suitable.
- Tracks: integrity, a place of separation. Found poor-quality installation fee.
- Prozvanivatsya diode bridge. In the diagram, the direction of current triangle stated otherwise physically (Lincoln error is repeated). Charges flow from plus to minus. Consider the fact, choosing the correct polarity.
- Semiconductors call, if you know how. Each transistor concept contains an arrow indicating the direction of similar diodes. Field-effect transistors with insulated gate will not ring, but a low resistance path in either direction. Designs are not listed, refer to the site.
- The generator broke down when the key element is not heated. Although diode circuit provides a high DC voltage.
Supplement, some power supplies are equipped with protection against the inclusion of no-load. In this case, you need to load a light bulb Ilyich. Line scanning operates at a voltage of 130 volts, there will be a half-intensity. Elements easily replace equivalent. It's worth noting, diodes, and a key element in return undertake high (in a scientific way, powerful).
Eliminating another failure, wait a little switch on the appliance. Try bulb, as shown above. If the light shines, the search must continue. Surely the circuit in a switching power supply is not ... Look here: http://telemaster.ru/shema/. Good enough kit. And in the example on the basis of the power supply micro HB600 everyone can view all what have just said. Some nuances. Before the bridge are degaussing coil (Degaussing), and the input filter is implemented on a single throttle. A diode bridge capacitor shunted to increase the service life of the device (to be sharp when the voltage jump, which is entirely skipped capacitor).
It is seen that the chip is powered generator voltage 8.5 V, taken from the main transformer. Power element is n-p-n transistor, the control pulse through a small separate transformer. the primary coil circuit is isolated three diodes connected so that the positive half-wave is not held on the ground until the switch is open.
The section provides two schemes of TV power supply with examples of micro-inclusions. Both can be seen that, we believe, at the initial moment jump goes to the output. Charges of the one capacitor winding, which takes power from the pulse generator. The result is a start key, and a power unit included in the operating mode. Then, the voltage of 8.5 V is continually replenished through the same winding.
Now, knowing the scheme of switching power supply, the readers will be able to list the possible faults. And having on hand a tester and a circuit can be sure to answer the question, why not turn on the TV, and it might break. At this good luck wishing to learn appliance repair their own hands and say goodbye until next time exactly. At the core of any work is understanding. Knowing what's inside the device, anyone can do mending. Moreover, switching power supplies are found everywhere. Chargers, DC adapters, PC monitors.
Repair of smart electronics, including controllers, is difficult. The technologies of "home" programming, the Russians ignored. Available to create complex devices, readers information, player formats of audio and video. On the knee to make a million. Verily, verily, I say.
- Why did TV turns itself
- Why is the washing machine does not start
- Why do not TV shows
- Why does not the TV
Informative ... And that's where d.most, there is a large cask, it is a little swollen, written on it 450wv, and can replace less - 400?
I have a problem TV Samsung's 2004 shaggy, probably a tube, no longer included. Called the electrician, he had dug there, everything is included, but it works 2-5 hours and turn off, click Enable - the screen ripples all. I think there is something warm and a TV set is switched off. After cooling activated for a short time.
Put in the fridge! But seriously, with the help of remote thermometer can be seen overheating specific details. Good luck.
TV Akai, floating droid and no longer function does not perform, does not meet either the menu or the other buttons. Baby remote control amused, might have something to activate it, tell me what to do, take away to be repaired, thank you in advance.
Perhaps you flew firmware. Try reinstalling.
When you turn the TV on and off light bulb, and the TV does not turn on. Tell me what to do?
We have an old TV ldzhi diode including the protection and standing on one channel, then do not switch, what do we do? Or it is necessary to throw away?
PHILIPS LCD TV is switched on only when the room is + 22-25. These pieces became the throw after a power failure. This is repaired?
I have the same garbage, too, Phillips, but the plasma, while not in the room temperature surges to +20 telly flips, the indicator flashes red, do not turn on, point the heater on it and voila - telly again normally.
Only the air conditioner will help you!
I have a Hyundai TV screen, it works, but the screen does not light up. What could be the reason?
Most likely it you broke.
When you turn the TV on and off light bulb, and the TV does not turn on. Tell me what to do?
Do not turn on the TV: causes and repair
Like any other equipment, televisions may fail suddenly fail. However, these failures occur regardless of the timing of operation of the device. For example, sometimes it is not included TV. When attempting to turn it back on various indicators blink, and click Relay. There may be other "symptoms". Let's look at why TVs are refusing to work and what to do in such a situation.
This problem can occur for various reasons. It happens that the LEDs blink as usual, but the TV still does not want to run. Also, the indicator is red, but the device can not be a remote control and is not included. Often it does not turn the TV as a remote control, and a button. The main body of the indicator is not illuminated. Another symptom - something clicks, buzzes inside the housing. The device produces a variety of sometimes quite strange sounds, but still does not turn on.
If they are on the body flash, the device self-diagnose and quickly find out the cause of the problem. Often on different models can be seen that the lamp or LED flashes a number of times. So he tells about the specific error. Part of the code for them can be found in the instruction manual. The TV manufacturers such as "Soni9raquo ;," Filips9raquo ;, "Panasonik9raquo; and the other has a self-diagnostic function. The central processing unit of the tire data receives information from the main devices and blocks. If you find a faulty node, the CPU will lock out the closing. Therefore, if you do not turn on the TV "Filips9raquo ;, but the indicator is flashing, you must read the error and decipher it. Then you can try to fix the problem. Also similar to the symptom occurs when the TV-panel functions as a computer monitor. If the PC is left in sleep mode or turned off, then when you press the power button on the remote LCD panel LED will blink several times.
Light emitting diode informs the user that the device power supply unit normally receives supply voltage. What to do if you do not turn on the TV and does not react to signals from the remote control? First - try to include it with the buttons on the TV. Perhaps the problem is caused by incorrect operation of the remote control or some error associated with it. But certainly not here to blame himself TV. If you do not turn on the TV LG and experience such symptoms, then the whole thing in a ceramic resistance of 4.7 ohms. It is located near the CPU - is broken. Replacing resistor will help to restore the device. You can take several actions. First of all check whether the batteries are OK in the remote control and whether contacts are oxidized. Next check infrared radiator and its integrity. Then diagnosed button. They can be sticky, because of what the panel and does not respond to commands. If the TV is "Samsung9raquo; It is not included, but the light is off, then the cause must be sought in electronic components. Something triggered a change in the properties of capacitors, so the power supply can no longer provide the normal start-up device. The only caveat - the definition of the fault localization will take some time. Also, experts recommend to disassemble the control panel and clean it from the inside. They often accumulate dust. This is not the best way affects the operation of the device. If the remote has been filled coffee, beer or any other liquid, and can not work, then easier to buy a new one. If you press buttons on the LCD TV control panel does not turn on, then there are only two options, why it happened.
This is one of the possible causes. TV In this case it may make attempts to start, but within a few seconds, the screen goes blank or completely stop responding to all attempts to run. The main and most popular cause of this problem - a failure in the supply of electricity your home network. The power supply system in modern TVs loves stable and quality supply. The most effective way to help solve this problem - it is completely de-energize the device. This can be done by pulling the plug out of the socket. After a few moments to recover. If there are persistent problems with stress, then the best solution - is the inclusion of TV via stabilizers, uninterruptible power supply, or even through standard power strips. But best of all, if you want to avoid these problems, turn off the panel when leaving the house. Then you will not be wondering "why not turn on the TV."
Modern flat-panel equipped with a huge amount of control electronics. Schematically, they are small PCs with a separate CPU that controls all important CPUs. For example, if we consider the schematic diagram of LED-TV, it is seen that the control voltage to the LED-diode is fed through the contact Stand-by and the transistor. If there is a fault, then the TV will not turn on. Then do not do without recourse to experts in the Service Center. Of course, if you have the knowledge and the necessary skills, you can try to fix the problem yourself. However, the trouble is that in the public domain there are no electrical circuit televisions. And fix the panel is very hard without them.
TV is not switched on, lights off
These symptoms are directly or indirectly related to the lack of electrical power. If a lamp burns out, then the device would function as normal (no indication). If this happens, then do not panic. First, you need to eliminate all possible problems that are corrected independently. But there are situations and complicated. For example, do not turn on the TV the LG, and the problem lies in the breakage of a resistor-fuse. Through these resistors to the circuit receives the voltage of +12 V. After replacing element TV operates in normal mode.
Sometimes quietly turned off the circuit breakers in switchboards. Faults occur in the very outlet. It is diagnosed by the indicator or multimeter. If there is no power, check the machine. If does not work, change the outlet.
This is a common reason why not turn on the TV. Check can be simple - if the unit from the wall outlet works, and an extension cord does not want to run, then the problem is clearly in the lead.
It often happens that a person accidentally or intentionally chooses inappropriate modes of operation. In this case the TV is off and not switched on or go into sleep mode. In this case, it will reset to factory default settings.
Malfunction of electronic components
As mentioned above, if you do not turn on the TV Philips, this is due from the breakdown of electronic components. For example, for some reason we burned resistors or capacitors. Current issue - fuses. Diagnostics and repair of these faults are best left to the professionals. Self repair can be very costly. If you do not turn on the TV "Filips9raquo ;, this is due to a broken capacitor in the power supply. As a result, the circuit 13 is fed in relevant 18.5 instead. It is often the cause of failure. Without the necessary knowledge to identify the problem yourself is very difficult - this is the work of service engineers.
If the TV is "Samsung9rdquo; does not turn on (and this applies to all brands), it does not mean that it is broken forever. It can be revived with the help of simple ways. But if the problem is in the capacitor or resistor, it is not necessary to undertake repairs without the proper experience.
Why not turn on the TV: 4 ways to fix the problem
Do not turn on the TV - a situation in which you need to understand and find the cause Once the TV is firmly established in our homes and widespread, it radically changed the life of a man, his partner and outlook on life. And now, if a TV is something happens in many real panic starts. What to do, when suddenly there is a failure, and the TV does not turn on, and the LED is flashing or not lit?
Modern TV is not turned on, and the indicator is: what to do
If the TV does not turn on, it is best to contact the service center. But, if today is the day off, or the trouble happened in the evening, you can try to correct the problem yourself. First of all it is necessary to conduct a preliminary inspection of equipment.
Instructions that came with your device provides complete guidance on this issue and how to resolve some of the major, and it is easy especially frequent breakdowns. Sometimes the problem is not including the TV may be in the wrong instrument is connected, and that accidentally pressed, and maybe broken off button. Might as well burn down the power supply.
Before you look for a solution to fix the problem, you must determine exactly type of your existing device LCD is the plasma TV, or CRT. Currently available and LCD, and CRT and plasma devices. If one of them broke down, no differences will not be repaired, because the difference is only in the "design" and the internal device unit is the same.
If the TV is not switched on, it is best to seek help from a service center
TV almost always have different problems, but they all seemingly have similar characteristics:
- Indicator is flashing red and green;
- The device clicks, hums, crackles and whistles;
- Indicator light does not work;
- Do not turn on the TV, but the indicator lights up blue.
Equally characterized by a broken device will also, once the lack of reaction to the remote control buttons, and the blackout at the time when the power supply is turned on. If the plasma is not immediately start, try again.
TV "Samsung" is not included: red light flashes and beeps
Before you start looking for faults, you must re-try to turn on the TV. It is very possible that the problem lies in the power button, if that, for whatever reasons, did not operate stably. Indicator light can either burn or not. In view of this, it is necessary to pay special attention to him
Many of those who bought a TV Samsung models le40r81b, le32r81b, le23r51b, le40s62b, le20s52bp face the problem of not turning on the TV. In this case, the lamp is lit, and there is no damage. Do not panic. In addition, it should be understood that the fault is not in the hardware manufacturers. With any brand product may befall similar trouble.
One of the most banal problems there is a failure in the electrical outlet, or at all, the reason the light off. You need to analyze the wiring for faults. Perhaps the failure is in the panel or socket, which simply turned off or stopped working from power surges. Sometimes, the reason lies in the complete absence of electricity. Check socket can be to include other device or instrument. If there is no power in the whole apartment, it is necessary to examine the machines. If the neighbors all works, and your apartment is de-energized, and you did not reveal visual reasons, it is necessary to see a specialist. Suppose that we have the duty master himself take the necessary measures.
If the TV does not turn on and the LED is off, check the operation of the outlet
If the TV does not turn on and the LED is off, it is necessary:
- Check the serviceability of the outlet into which the device is activated;
- To analyze the integrity of the cable network unit;
- Check the voltage on the network throughout the apartment;
- Ask if there is power at the neighbors.
Only if all the questions will be a positive response, it can be assumed that the problem must be sought in the instrument.
Why not turn the TV Phillips: What to look for the problem
If the light is on, and the TV does not turn on, it can be assumed that the consumer incorrectly applied the active mode. Many modern devices have features that allow you to enter "sleep" state. With this turn of events, the TV must respond to the remote. You need only go to the menu and turn "TV" mode.
If your TV is connected through an extension cord Philipstea1507p worth checking out when he damaged some parts, such as chips or condenser, or the power supply and the buttons. In this case, it is best not to try to solve the problem yourself. Your not the right action can only hurt the device even more.
If you are going, yet alone try to repair the device, the study manual carefully and follow its instructions only. Start with the fact that try to switch off and switch on the TV again. If your TV model is relatively new, and recently acquired, the global problems she should not be. The simplest failure may lie in a faulty power button. It may simply be turned off. If the lamp indicator on the TV is on, but the unit will not turn on, then it means the food is all right, just the device does not turn on the first try. Do not look for yet other reasons, just try to reboot your device.
Philips TV may not be included due to the fact that he set the sleep mode
To start the system, try the following steps:
- If the light is switched on by remote control, then try to turn the unit directly from the TV control panel. Perhaps you simply faulty console, or it the batteries run down.
- When the TV does not want to be included with the TV, then you need to pay attention to the light duty regime.
- Dark screen also will transmit signals with a weak, or poorly if stuck antenna.
- Sometimes after switching on the TV lights up and goes out again after a few seconds. This may mean that one of the broken chip devices, and fast turn-off is a simple protective function. If the device goes into protection, you should call a TV technician.
If the TV is turned on for a long time, the cause may be a malfunction of one of the television unit. Different models of damage to the TV can be very different. Reveal serious irregularities without proper experience is quite difficult. Better to give it to the repair to professionals.
Do not turn on the TV LG: Flashing light
Like any household appliances, television peculiar malfunction. This can happen regardless of the period of operation of the device and the manufacturer.
When the indicator is blinking relay the TV series LDZHI 42pa4510, ld33b, 42ld650, 42la621v themselves give a signal that there are problems in the unit. Typically, a red light a certain amount of time should be flashing. You just have to open the user's guide, and find the section that outlines types of breakdowns and their indication that the device responds to the problem.
Another option, which may cause a similar symptom occurs when the computer is connected to the TV as a monitor, or a player. If the latter went into "sleep mode", and can be fully turned off, the TV when the remote control will be a few seconds to signal indicator.
The flashing light on the LG TV reports on the device failures
According to this principle works modern televisions and the following companies:
Overheating of internal components or the TV cabinet - a very common problem for modern devices. In such a case the non-inclusion of the device, the dark indicator and clicks served itself felt even in a working model. Let the appliance rest for a couple of hours, and everything will work out. Just TVs will whistle and not include indicators, if the power supply is too big load. Replacing the transformer, transistor or microchip you can solve the problem. If shut down, or settle old telly, there is reason to look for must master.
TV beeps and does not turn on (video)
TV, today, is one of the most popular ways of recreation and leisure. And its serviceability concern to all residents of the house. In order to avoid major problems with this type of equipment, the device must be operated strictly in accordance with the instruction, and periodically preventive examination technician.