What to do if the TV does not show channels
After discovering that the TV does not show channels, first of all you need to look at the antenna connection. Maybe the plug just came off. It is also worth paying attention to how exactly the TV does not show:
- if there is no signal on all channels, this is a serious problem;
- if there is no signal on only one channel, this is a temporary problem associated with the broadcast of this channel.
It happens that the TV shows poorly, this indicates that the signal is passing, but not of high quality. That means we need to look for the cause of the signal attenuation. This includes both mechanical and software factors. Mechanical, you can try to fix it yourself:
- check the position of the antenna;
- try to re-configure the channel using the remote control;
- check wires and connectors.
All service works are guaranteed for a period of 2 years. Call the service and watch TV without problems!
When not showing TV
When the TV is not showing, you can try to fix it. Simple DIY Repair Options:
- check the wires for breaks and breaks;
- restart all equipment;
- check the reliability of the connectors.
If everything turns out to be useless, you need to call the service. Our dispatch service works from 7:00 to 24:00. The foreman leaves within two hours after receiving the request for repair. Departure range within the Moscow or outside the Moscow Ring Road up to 20 km.
A certified technician will quickly find the reason why he stopped showing TV and suggest possible solutions to the problem.
We offer you a TV repair, if it does not show, at a bargain price, from:
Why doesn’t TV show after turning on? This question is often asked by clients of our service. To answer it, you should determine the possible causes of the malfunction.
This includes several types of breakdowns:
- the television receiver is broken;
- malfunction in the unit responsible for receiving the signal;
- mechanical damage to wires;
- hardware and software failures;
- there is no signal from the antenna, satellite dish or provider. If the reason is
- the provider’s side, it is enough to make a call to technical support and follow the instructions of the operator.
Some simple causes of breakage can be corrected by yourself. If it did not work out, then the most correct decision is to contact the service center, without delay.
Common causes of TV breakdowns
If LG TV does not show, first check that the following conditions are met:
- no damage to the wires;
- the device is connected to the network;
- no problems with the home network.
If everything is in order with the wiring, then the reason is different:
- the TV set is broken;
- the signal receiving unit is defective;
- hardware or software failure;
- the signal from the antenna, dish or from the provider does not come.
To see which output mode is worth: you need to press the key combination “Win” and the English key “P”. After that, you should see such a window sweat. Choose one of the last three options. But the best of all is “Duplication” and “Projector only”.
Try disconnecting everything you can from the TV. Including all sorts of TV-receivers, USB drives. This also applies to connections via AV ports. In general, turn it off. that’s it!
On LG TVs, there is a feature that allows you to manage connections. But she also interferes. Press on the remote control on the button with the house icon, then select “Settings”. “Additional. settings “-” General “- scroll down to the function” SIMPLINK (HDMI-CEC) “
No image via HDMI on TV or monitor: what to do and how to be
Hello everyone! Today we will talk about a very strange, but interesting problem, when you connect a laptop or computer to the TV using an HDMI cable, and you see the inscription “No signal” on the screen. The problem is not new and has several solutions. Most often, a connection error occurs either due to hardware problems: for example, when the cable simply leaves in some place.
In other cases, this usually indicates problems with the computer or laptop, and in particular with device drivers. We’ll talk about all this at the very beginning. But first, it will try again to output the signal and images to the TV.
How to fix LG TV says No Signal when Connected to HDMI.Quick Solved in 2 Minutes (100% worked)
Screen frequency changes
- Right-click on the desktop. There should be displayed two squares with the inscriptions 1 and 2. 1 is your computer or laptop, and 2 is a TV;
- Scroll down and find “Advanced Display Settings”;
- Now you need to go to the properties of the second display, go to the “Monitor” tab and set a different frequency. If your TV operates at 60 Hz, then we set this. Sometimes you need to set 25Hz to work on older TVs. Click “Apply” and “OK”;
- Right click on the desktop and select “Screen Resolution”;
- In the line “Screen” you need to select the second image. so that it is in front;
- Go to the “Additional parameters” tab. “Monitor”, set the desired frequency and click “Apply”;
- Click on the “Win” and “R” buttons. We register: “devmgmt.msc”;
- We go to the “Video adapters” section. There we find our video card, right-click and select “Update drivers”;
- At this point, you should be connected to the internet. Next, select “Automatic search for updated drivers”. We are waiting for the driver to download and install. If the system said that the drivers do not need to be updated, then you cannot write off rejoicing, since this means that they simply do not exist on Microsoft servers;
- Therefore, we do it differently. go to the “Properties” of the video card;
- Next, go to the third tab and select “Equipment ID” in the properties;
- Copy the first value and go to the site. driverslab.ru;
- Insert the value into the search bar and click “Find”. Usually the driver will be the very first. so download it. Next, open the archive and run the “exe” file
The best way to fix something is to do it again, but in the right way. Therefore, let’s try to “connect” again, perhaps you are just doing something wrong.
- Pull out the connected cable and plug it back into the HDMI port and immediately remember which one. I have it at number 2;
- We connect to any free port on a laptop;
- Or on the system unit of a personal computer;
- Now on the remote, you must turn on the button that displays all connections to the TV. It can be a button labeled “Input” or “Source”;
- Now this section will open in the menu, where all ports and inputs are presented. Choose the one through which you connected your laptop or computer;
- One more point. on some TVs there is also a menu that indicates the type of device to be connected. This is necessary in order for the image to be of acceptable quality. Therefore, find the button to change the name and select “PC” or “Notebook”;
If there is no picture on the screen, and you still see this unfortunate inscription, then move on. Also, if there is still an image, but there is no sound, then go to the last chapter.
- In the lower right corner of the screen in the tray, we find the speaker icon and right-click on it;
- We select “Playback device”;
- Now you need to select your TV, which should also be displayed on the screen and press the right button, and then select “Use as default”.
If the sound does not appear, then you also need to update the driver for the video card, since often the sound comes from it. How to do it. I wrote above.
No signal on TV
There may be several reasons why there is no signal on the TV. The problems that have arisen can be attributed to one of three groups:
- External problems.
- Problems with your hardware.
- Other problems.
If, when you turn on the TV, you find that it does not work, then first of all check that you have selected the correct receiver input on the remote control. If true, then in order to understand why there is no signal on the TV, you need to check all possible problems from the list below using the elimination method.
First, check if your satellite TV operator is doing maintenance work. This is probably why the signal on the TV went missing. You can find out such information on the official website of the company.
Also, the lack of a signal may be due to bad weather conditions. If there is a thunderstorm or heavy snow outside the window, then you just need to wait for the weather to improve.
If the TV says “no signal”, then check the position of your satellite dish. There may be no signal if the plate is damaged or a layer of snow and ice has formed on it. In this case, try to carefully clean the plate and try to fix it more tightly in the desired position. But in case of such problems, it is better to entrust the antenna tuning to professionals.
However, the most common reason the TV shows is “no signal”. this is a breakdown of the satellite converter. In this situation, only the purchase of new equipment will help.
Also, do not forget to check the cable and its connections. It is possible that the TV is not working precisely because of damage in the cable. Or a receiver. Try to connect the receiver to a known functioning antenna, if there is no signal, then you need to return the receiver for repair or purchase a new one.
If you have not used the equipment for a long time and, when turned on, found that the TV does not work and there is no signal, then this could be due to obstacles in the signal path. Even a grown tree branch can interfere with the signal. If such an obstacle was found, and it cannot be removed, then, unfortunately, the plate will have to be reinstalled in a new place.
If all actions did not lead to a positive result, and there is still no signal on the TV, then you should call a specialist who can accurately determine the cause of the problem.
What to do if there is no network on the TV?
A classic solution that often leads to success: checking all cables. Make sure the antenna is plugged in and check all signal wires. It can help, for example, turning off and then turning on the antenna, amplifier, set-top box and the TV itself.
What to do if there is no signal on your LG TV?
If the TV shows a black screen or a “No Signal” message, it usually means that the wrong input is selected. Turn on TV. Press the Menu key while the TV is on to test the operation of the product. If the menu does not appear, contact Customer Support at 8-800-200-7676.
Why does the new TV write no signal?
If the TV says “No signal” or it is very weak, which is why the channels are actually poorly shown, then the connecting cable is most likely damaged. Diagnostics involves a thorough check of all plugs, as well as wires for breaks and other mechanical damage.
Why is there no signal on the screen?
The most common reason why there is no signal on the monitor or it is transmitted with interference is a missing or poor connection to the system unit. First of all, be sure to check if the cable from the monitor is securely attached to the input of the computer’s video card.
Where to call if there is no TV signal?
We recommend that you contact the “hot mowing line” number of the CETV company: 8-800-220-20-02.
Why is there no signal on the TV screen??
The “no signal” inscription on the TV screen is usually associated with the operation of the antenna. Check if the signal from the antenna reaches the receiver (the receiver’s display will inform about the signal reception, the antenna indicator will light up there. 3 hemispheres). Please note that the receiver must be turned on.
What to do if the signal is weak or there is no signal on the TV?
- Press the Source button on the remote control.
- Select TV.
- After selecting the signal source, you will need to launch Auto Channel Search.
- Scroll down to the Channel section and press Enter.
- Select Auto Tuning.
- Click Start to start auto-tuning.
- Set your channel search parameters and select Next.
TV writes that there is no signal: what is the reason and what to do
Someone likes to “surf” the Internet, while others watch TV. You somehow turn on your TV-device and you see the message “No signal” on the screen. You start switching channels. none of them show. Why did the signal suddenly disappear, what is the reason? Do you need to call specialists right away or you can decide everything yourself?
The TV says that there is no signal. why is this happening and what to do with the problem
We will tell you what can trigger the “No signal” error on TVs.
If there is no signal, check the cable connection
Hardware check: antenna / dish, cables, set-top box
Your set-top box or TV could freeze (the set-top box is not used if the device supports Smart TV. these are modern TV models). Reboot the device: turn it off using the button on the remote control, disconnect the TV / set-top box from the power supply for at least 30 seconds. Plug the power cord back in and turn on the device. If the signal does not appear, check the equipment for damage.
Press the red power button to turn off the TV
- dish or antenna (depending on what is used);
- a cable that supplies a signal from an antenna / dish;
- set-top box (differently receiver, tuner) or TV.
Start by checking the cable: it should be intact along its entire length. See if there are any breaks, strong bends, cracks, etc. The plugs should be intact, the contacts on them should be free of oxidation. If there are problems with the cable, just change it.
If the cable is damaged, buy and connect a new one to the system
If you have the opportunity, inspect your antenna or dish. There should be no dust, dirt, ice on it. If the surface is dirty, clean it gently if you have access to it. If there is no access, call a specialist who can reach it using special equipment.
Due to snow, the plates may not pick up the signal from the tower
See if the dish / antenna is broken or defective. Some element may have broken. In this case, you will have to replace the antenna. If you are not sure that you yourself can determine externally whether the antenna is operational or not, call the wizard.
The receiver itself may also be faulty (the device that receives the signal is a TV or set-top box). Outwardly, it is almost impossible for an ordinary user to determine a breakdown, so it makes sense to send the device to a service center for troubleshooting.
It is not worth repairing such devices on your own without the necessary skills and qualifications. If there is a breakdown in the TV, the defective item will be replaced. Perhaps the contacts at the output for the cable were simply oxidized there. they will make you a simple soldering of the damaged area. If the attachment breaks down, most likely you won’t get off by replacing the element here. you will have to buy a new one.
External factors: bad weather and its consequences, obstacles in the signal path
We have partially described the consequences of bad weather above. What if the signal disappeared after a strong wind or rain? An antenna or dish could change direction. In this case, you need to adjust the position of the device again. experimentally catch the correct one. To do this, you will need the help of another person: for someone to turn the antenna, and someone to watch the signal on TV. Note that you need to rotate the antenna slowly.
Your neighbors’ antennas can help you. see where they are pointing. For the most accurate angle setting, you can use the angle calculator, which can be downloaded from the official website of your provider. The initial information for the calculation is your location data. They can be obtained using the GPS of your smartphone.
When choosing a direction for a dish or antenna, be guided by the same equipment nearby
Perhaps it is raining, snowing, or strong winds right now. In this case, there may be no signal. Here you will not do anything. you will have to wait for everything to settle down and nothing will interfere with the signal from the tower to the antenna / dish.
If the weather is bad outside, the signal on the TV may not be available.
Poor image or lack of it may be due to obstacles that have appeared in the signal path from the tower to the antenna. These can be tree branches, buildings, buildings. If it’s just wood, cut off the part that covers the equipment. If this is a new build, move the antenna higher or find a location on the other side of your house. Again, specialists will be able to install the antenna correctly. it is better to entrust this task to them, if possible.
Reason on the provider side: maintenance or repair work
If you use digital, cable or satellite TV from a provider (pay separately for TV) and you have lost the signal, perhaps the company’s specialists are now repairing the line or updating the equipment. How to find out about technical work? Call Support for your job. the fastest and most reliable way.
Call your provider’s hot line to find out if maintenance work is underway
Of course, you can open the official website of the provider and see the information there. in the news section. But information is not always posted, so it is better to call immediately. If the work is actually underway, you will be told when it should be completed. If everything is in order on the mowing line, you will be consulted on the issue. they will tell you what you need to do to return the signal yourself. If home measures do not help, call the hot line again and call the master at home.
If you are unable to call your provider now, do the following:
- Take your TV or set-top box remote.
- Click the Menu button.
- Check if there is a No Signal Alert in the menu. If there are channels and they do not turn on, then the reason is on the side of the provider.
Diagnostics of technical devices
The absence of a signal is most often the result of technical problems. The list of possible malfunctions is extensive. Damage can occur to the receiver, cable, antenna or dish, TV.
First of all, check the integrity of the connecting cable. If damaged, the signal may be weak or not. Make sure that the insulating shell is intact, there are no breaks. The damaged wire will have to be replaced. You can make repairs for minor defects, solder the broken wires, if you have experience and skills. Check antenna cable
Before purchasing a cable, consult a specialist. The quality of the transmission directly depends on the correct choice. If replacing the cable does not completely solve the problem, check the condition of the connectors. They can be damaged during operation.
Accumulation of dirt, dust, antenna icing. cymbals can cause deterioration, no TV signal. Inspect the structure, if necessary, carefully clean its elements. Ensure the integrity of the receiving equipment. Strong storm winds can damage the elements of the dish, TV antenna. If there are breakdowns, the device will have to be repaired or replaced.
Bad weather can be the reason
The problem may be caused by a defective receiver. This device adjusts the incoming digital signal. Converter repair can only be done by a qualified technician. In most cases, the defective device must be replaced.
Signal may not be available due to faulty receiver
Not a single vehicle is insured against breakdowns. If the TV does not show, there is no signal from the antenna, it is possible that the contacts in the cable connection socket are oxidized. The damaged areas must be re-soldered. It is better to entrust this work to the master.
No signal due to external factors
External factors influence satellite signals. You should not look for reasons why there is no high-quality, stable signal on the TV when there is a heavy downpour or thunderstorm outside. These climatic conditions disrupt transmission. Crowns of trees and buildings interfere with the waves. Because of them, there may be a weak sound, poor quality picture.
Heavy wind can change the position of the antenna, dish, which leads to a decrease in the quality of reception. You can cope with the simple installation of the device in the optimal position yourself. The initial position of the antenna can be determined based on the direction of the devices in neighboring houses and apartments. Then:
LG TV No Signal Fix it Now
- slowly turn the antenna to one side and the other;
- identify the direction in which quality is improving;
- find the point with the best picture, fix the device.
The angle calculator will help you to make the most accurate adjustments. It is on the official resource of the operator. Take advantage of the automatic program in the GPS of your smartphone. It will calculate the exact angle from the location data.
Adjustment and installation of the dish
If it is difficult to determine on your own where to install the plate, contact a specialist. They will ensure the correct position of the receiving device, perform a reliable fixation.
Smart TV software updates
A specific problem may arise for owners of Sony, Philips, Samsung, LG models with the Smart TV function. The integrity of the cable has been checked, the antenna, the receiver are functioning normally, but the TV says “no signal”. The question arises what to do in this case. The most likely cause is a software update. Samsung installs new versions on a regular basis. They are developed to optimize the operation of equipment, eliminate errors.
Installing the updated program is a prerequisite, without this the television will not work. This process is usually performed automatically. But if it doesn’t, install the new version manually. For this:
- connect the TV to the Internet;
- use the remote control to enter the “settings” in the “menu”;
- go to the section “support”, “software update”.
Updating the software may fix the problem
The further algorithm of actions is different for different models. After checking for updates, the system will offer to install them. The process runs automatically, after which the TV will reboot. If no signal appears, tune channels again.
What to do if the TV says no signal
The lack of a signal on the TV creates significant discomfort. The cause of such a problem may be technical problems, malfunctions of the operator, climatic factors. The help of specialists is not always required to eliminate it. After reading the article, you will be able to determine why there is no signal on the TV, what to do in a particular case. This will help you cope with most of the problems on your own.
Carrying out technical work at the provider
Each operator periodically carries out preventive maintenance, and emergency repairs may be necessary. There is no signal during this period. There are several ways to check if the provider is working normally. If you want to know why there is no digital TV signal today, you can:
- call the operator on the support phone number;
- find information on the Internet on the official website of the provider;
- check notifications in the receiver.
If you cannot turn on the channels to check the notifications, use the remote control to enter the receiver’s system menu. In the system menu, when carrying out repair, preventive work, the provider receives a notification “no signal”.
Calling your provider’s Support may fix the problem
Cable subscribers have to deal with problems with set-top boxes. These devices often freeze. The problem is not difficult to fix. Unplug the plug from the socket, turn off the set-top box, turn it on, allow time to reboot. If this technique does not solve the problem, call the managers on the hot line. Perhaps you need the help of a specialist to solve it.
What to remember
If your TV has no signal, then do the following:
- If there is no signal, first make sure the provider is not doing repair work.
- Diagnose the condition of the cable, antenna, the correct operation of the TV, receiver.
- Update Smart TV on time.
Do not engage in self-repair of a TV, receiver, plate without qualifications and skills.
Failure of the matrix
Matrix breakage is perhaps the most common reason that there is no picture on the TV screen. Also, damage to the matrix can cause a number of other symptoms:
- video shakes;
- the image is displayed only on half of the screen;
- various stripes appear around the perimeter of the screen.
Why is the matrix not working? The component fails due to short circuits and mechanical damage. It is impossible to repair a faulty matrix. Therefore, a part is replaced. If defects began to appear for no reason, for example, the image darkened sharply. The matrix elements are probably damaged, their replacement is much cheaper than the entire module.
Can you change the matrix yourself at home? This is theoretically possible. However, it will be extremely difficult for a person who has never repaired TVs. In addition, instead of the broken part, you need to install the original matrix. It is very difficult to buy branded components.
Sometimes the image on the LG TV disappears due to damage to the matrix cable. Breakage manifests itself in the following signs:
- the image periodically disappears;
- unsatisfactory picture quality. there are noise, ripples;
- there are horizontal or vertical black-and-white, colored stripes.
The specifics of the elimination of the breakdown will directly depend on the specifics of the damage to the loop. If the malfunction was detected at an early stage, then the service center masters will rewire the damaged sections of the loop, restoring the TV to work. In some situations, you have to change the matrix cable completely.
The second option is considered a more durable solution to the problem. A soldered loop will work for a relatively short time. Therefore, it is wiser to immediately change it to the original component. You should not do this on your own. Entrust the work to professionals.
Reasons for the disappearance of the image
The most common reason for the disappearance of the image on the LV TV is hardware breakdowns. What to do in such situations? How to restore correct broadcast of digital or analog TV? It is necessary to carry out diagnostics to determine the failed module.
Immediately after identifying a damaged component, it must be replaced. You can do this yourself. However, this option is relevant, provided that you have the necessary skills and equipment. If you do not know how to repair TV, then contact the service center.
Now let’s go directly to the consideration of the main reasons for the disappearance of the image.
Capacitors burnt out
In LCD TVs, capacitor problems are caused by power surges. Signs of a defective capacitor:
- the picture is double;
- there is no image;
- the TV turns off arbitrarily;
- low brightness level;
- incorrect color rendering.
In order for the device to start working correctly again, you need to disassemble it. On the board, you will see a damaged capacitor and a blown fuse.
If the breakdown is not eliminated in a timely manner, the malfunction will worsen. After a while, there will be irregularities in the operation of the power supply. The set of procedures aimed at diagnostics is identical to the situation with a broken matrix.
Replacing capacitors is a complex type of hardware repair for TVs. The slightest inaccuracy will provoke an aggravation of the malfunction. Therefore, it is wiser to entrust the elimination of the malfunction to the specialists of the service center.
Types of malfunctions
If there is no image on the LG TV, but there is sound, then this is just one of the signs of a malfunction of the equipment. There are other symptoms that also indicate the presence of problems in the operation of the TV device. Let’s consider the most common defects.
Image flashes continuously, brightness level has decreased.
Deactivate power saving TV mode.
There are defects on the screen and the diagnostic test found no problems.
Check if the connection is correct according to the signal source.
Go to “Advanced settings” to adjust the brightness settings.
The image is doubled or too blurry.
Disable Eco Mode and Energy Saving Features.
Check the quality of TV signal reception.
Disconnect the cable and then reconnect it.
Dotted line appeared along the TV screen.
The user can eliminate the defects listed above on his own. Many of the troubleshooting methods described above can also help if there is no picture but there is sound.
If the quality of the audio signal does not raise questions, and there is no picture, it is imperative to check the integrity of the connecting elements. It’s about the cable. Which one? The answer to this question depends directly on the signal source. Therefore, you need to inspect:
- antenna cable;
- HDMI wire;
- cable connected by your cable TV provider;
- Ethernet cable (provided that you are using Smart TV).
Use special software to determine the cause of the black screen. For example, the Moninfo utility. It helps you identify audio and video problems. If the program detects malfunctions, you must carefully inspect the cable for damage.
Burnt out inverter
Due to the fact that the inverter has broken down, the TV screen stops working. Breakage symptoms:
- distortions appear, the picture twitches;
- the image is missing in principle or takes a long time to load;
- the TV display dims after switching on and instantly goes out;
- sound is transmitted correctly, but ripples appear on the screen;
- the picture is very blurry, the brightness level is low.
The main function of the inverter is to supply voltage to the backlight lamps. Therefore, if the TV screen does not light up, then perhaps the reason lies precisely in the malfunction of the inverter.
- conversion of direct (12-volt) voltage to alternating;
- stabilization of the input current of the lamp to the required indicators;
- adjusting the brightness level of the image;
- matching the output stage with the input tube resistance;
- protection of microcircuits and boards from possible short circuit, overload.
How to determine if the problem with the lack of image is caused by the failure of the inverter? It is necessary to disassemble the TV and carry out a comprehensive diagnosis. The breakdown of the module can be determined during the visual inspection.
To restore the TV, you need to have at your disposal a hot air and infrared soldering station, as well as a multimeter. A good knowledge of physics and electronics is also required. It is extremely difficult to say which element has failed. Incorrect operation of the TV can be caused by a breakdown of the lamp, transformer, controller board.
No digital channels
The problem with the transition to an all-digital TV signal has led to a lot of questions from consumers. If your TV has a cable connection, there are many factors that may cause instability in the input data. For example, with the influence of external interference: ignition systems on cars, birds, poor quality of the general house signal amplifier. Do not assume that your TV or set-top box is broken. Sometimes, due to ongoing maintenance work and even bad weather, it can be quite difficult to catch a signal.
To minimize losses in the quality of data transmission over DVB-T2, you need to correctly position the cable through which it is connected. The higher the wire is, the more interference will affect the signal. In addition, its distance from the set-top box itself is also important. an external receiver or built-in TV unit.
The loss of digital channels may be due to weather conditions: in winter, the reception will be better than in summer, in hot weather. The presence of dense foliage on trees during warm periods of the year can screen the signal from the antenna installed outdoors. If the problem persists for a long time, it makes sense to purchase an amplifier. It is placed next to the antenna, as close as possible. Channel reception will become more confident.
Connection through an external receiver. set-top box, may be disrupted due to the interruption of the contact of the plug with the jack of the TV or the receiver itself. This happens especially often if the devices have been moved or shifted. The slightest effort or jerk will cause the SCART or “tulip” to stop broadcasting the picture. In addition, a break may occur in the cable: it is worth buying a new one and testing it in operation.
Important! If not all, but only some of the channels disappear, the problem may be in receiving signals from several sources. Manual setup of the set-top box will help to solve the problem.
What determines the signal level?
The quality of a TV signal, even in digital format, is a rather unstable concept. It can be influenced by weather conditions: cloudiness, wind strength, and other external disturbances. If the TV showed poorly in the morning, and by the evening it stopped picking up the signal at all, you should make sure that such sources of problems did not appear suddenly. For example, in case of strong clouds, in snowfall, the TV can show a blank screen until the noise disappears.
The appearance of a mechanical barrier: a new building, structure, can become a serious problem for broadcasting a television signal. In this case, find the optimum receiving point by moving the antenna. The signal level in TVs working with DVB-T2 varies from 60 to 84 dBμV. these are standard values. The more noisy the image, the more difficult it will be to adjust. This indicator will be different for each frequency. The use of coaxial cables helps to reduce the influence of external noise.
What to do if there is no signal on the TV?
What to do if there is no signal on the TV, why does not it show from the antenna, digital channels stopped working. with these questions, the owners of modern TV equipment often contact service centers. In fact, most problems are fairly easy to fix on your own. How to do this and not harm the TV is worth talking in more detail.
Screen is missing
The complete or partial disappearance of the image usually indicates technical problems in the TV itself. A more accurate “diagnosis” will depend on what can be established in the course of self-diagnosis.
It is always necessary to consider the problems arising with the supply of a stable television signal in combination. If all external causes are excluded or they cannot be reliably established, you should pay close attention to the accompanying factors. For example, the presence of any image, inscriptions on the screen. All this data will help you get a better understanding of the source of the malfunction.
Black or partially black screen
The complete lack of reaction to switching on, the black color of the screen usually indicates that the breakdown is quite serious. There are several probable reasons worth noting.
- Defective backlight. In this case, the TV retains all functions except for adjusting the brightness of the screen. By shining a flashlight on it, you can see the image. Replacing the LED backlight is done at the service center. If you do the work yourself, you can damage the matrix or other parts.
- The TV does not turn on at all, there is a noticeable smell of burning around. Most likely, the reason is a surge in the mains voltage. It is necessary to de-energize the device, contact a repair specialist.
- A black screen with a horizontal stripe in a light or bright color. The reason is the frame scan. The problem is found mainly with CRT TVs, it is solved by replacing the unit. A vertical bar indicates a breakdown of the transformer in the line scan unit.
- The TV turns on, the screen turns off immediately. Most likely, the matter is in poor power supply from the mains. You need to check the wire and power supply, the outlet, the presence of voltage in the entire apartment.
- There is no sound or image, the display is on. Probably broken video processor.
These are just some of the reasons why the picture on the screen may disappear. If the breakdown is serious, it is better not to leave the device plugged in, you should try to call the master as soon as possible.
What does the inscription mean??
Usually, the TV reports the absence of a signal on the monitor when it is turned on or during the operation of the equipment. Modern Smart TVs issue such a system letter with prompts. For example, the message may contain information about where the cause of the loss is located: there is no contact with the network cable. Such informational tips can be very useful for an inexperienced user who just wants to watch their favorite series or long-awaited blockbuster on TV.
The “No Signal” sign does not have to be permanently displayed. Sometimes she interrupts the broadcast, then disappears. Such short-term interference is usually associated with the passage of vehicles, the effect of wind gusts on the antenna. The inscription “No signal” also appears before the TV is turned off due to a drop in mains voltage. In any case, the reasons for the disappearance are not in the TV itself, but you need to look for them in the sources of external connection.
Most often, when the user speaks about the absence of a picture, they mean a blue background that appears instead of the broadcast image. If we are talking about CRT TV, we can talk about memory interruptions or breakdown of the video amplifier responsible for this tone. On a plasma display panel, the source of this problem is a breakdown of the signal processing unit. There are several of them, it is possible to establish exactly which module is faulty only in the workshop.
If a blue screen appears on an LED TV or LCD screen, the problem lies in the matrix. It needs a complete replacement, comparable to the cost of the device itself. A blue screen, on which there is an image. channel numbers, menu items, appears when there is no signal. The reason may lie in the antenna or cable, as well as in the incorrectly selected operating mode of the device.