Doesn’t show the TV says no signal
Why is there no picture on the TV through the HDMI cable from your computer (laptop)
In some cases, after connecting the TV to the computer or laptop via HDMI cable, the TV just does not show the image. Rarely, but it also happens that you have sound on HDMI but no picture on your TV. Although, it seems to me that most often encounter the opposite problem, when the picture is there, but there is no sound on HDMI.
In this article, we will try to deal exclusively with the problem of the image output through the HDMI cable. Everything seems to be simple there, you have connected the TV with the computer, selected the desired input on the TV, and if necessary, on the computer also select the desired mode of picture output. And by the idea, everything should be working by now. And instead we see the inscription “No signal” on the TV.
Before jumping to any tips, look at the instructions for connecting your TV to your computer via HDMI:
If you do everything according to the instructions, but there is no result, and the image on the TV and did not appear, now we will look into it.
It sounds funny, but the first thing to do is to check the cable. There are several requirements that must be observed:
- Firstly, the wave impedance of the TV cable is 75 ohms. Deviations of this value will cause some power to be reflected in the path, and this will inevitably lead to losses. Invented ways of harmonization, which allows you to use a cable with a different wave impedance. Let’s wait a little longer to start a garden. Devices designed to work television broadcasting, the wave impedance of 75 ohms. Consider the alphabetical truth when selecting a cable.
- The second advice concerns owners of indoor antennas. A typical picture: a wave channel, a half-wave vibrator with tendrils, and a coil of cable lying nearby. First of all we have to check if the antenna is active or passive. We have to switch on the power? If it turns out to be passive, we cut off the extra cable and decorate the pantry with the bay. The feeder segment introduces an irreparable signal loss. In the antenna receiver the sensitivity strongly depends on the attenuation up to the first amplifying stage. In our case it is inside the TV set, and the cable to the socket causes incredible losses. Another thing is an active antenna. The first amplifying stage is located here, the cable length becomes uncritical.
- If the passive antenna is on the roof, it’s a good idea to get the cable characteristics from the Internet. It makes sense to see if the linear loss is greater than 0.2 dB. The attenuation is determined by the length of the feeder, the electrical characteristics of the product. Three meters of good cable introduces an attenuation equal to one meter of cheap cable. It is recommended to put an antenna amplifier, replace the cable. Fortunately, television is inexpensive. Forget the high-frequency WI-FI!
The T2 set-top box is not finding channels
If the T2 tuner does not find channels, what to do? Consider standard situations.
Poorly matched TV antenna
The most common situation where the antenna does not receive or poorly receives DMV-band and T2 channels, and is more designed for MV-band, in which and worked well 4-5 channels in analog format. In this case, you need to buy an antenna for T2, taking into account individual reception conditions:
- distance to the transmitter,
- Landscape features of the area,
- building density,
- other factors affecting the signal level.
It is obvious that in the zone of direct visibility of the repeater and absence of dense buildings the indoor antennas for digital TV will do. You can say it is an ideal case for receiving terrestrial television, which is typical for large cities. But these situations are not so many. The most common situations are when the signal level is weak. because of the huge amount of interference, or because of the long distance to the repeater.
In extreme cases it is necessary to consider outdoor TV antennas with the maximum gain. They are placed in our category antenna for T2 100 km and designed for installation in areas with weak signal. It is necessary to remember that such antennas must not be used in immediate proximity to transmitters because it is possible to receive the opposite effect. signal overamplification.
Article The choice of the aerial for Т2 TV is called to help in a choice. A simple principle of choice. the further the place of reception from the transmitter tower, the higher the gain the antenna should have. On our site can help you in choosing the filter “Distance from the tower”.
Periodically the T2 signal disappears
If the aerial was established long ago, the reception of analog and digital broadcasts didn’t cause problems. Over time, periodically began to disappear T2 signal, and later stopped receiving any channel and the tuner writes no signal. In this case it is necessary to carry out inspection of all aerial system, to understand why there is no T2 signal.
What to do?
It is necessary to go step by step from the aerial to the final connection point (receiver), go through and look through all the contacts (connections).
- First of all we check the F-connector. On the connectors over time appear oxidation, which can cause a significant weakening of the signal.
- Check the TV cable for breaks, over the time of use it can become worthless.
- If the antenna with an amplifier, check the amplifier.
If you find problems with the connectors or cable, it is better to replace them completely. It is better to choose the quality components which will serve you for many years.
The antenna has an amplifier, and it does not work
If the antenna with an amplifier does not work, you need to perform diagnostics to determine whether the TV antenna amplifier itself is broken or not powered. Power can be supplied through the TV cable from the power supply unit or from the T2 receiver itself.
If the amplifier fails, you will need to replace it with a similar to its characteristics.
Tuner does not support DVB-T2 standard
Strangely enough, but in 2021 you can still encounter the situation when the TV set doesn‘t show and writes no signal due to the incorrectly selected terrestrial receiver. You can buy cheap DVB-T tuner on OLX, and then ask why T2 does not work? Pay attention, possibly your receiver has no DVB-T2 support, but is a DVB-T receiver. After all, this standard is still widely used in neighboring countries, and could come to Ukraine from them.
Repeater without DVB-T2 signal support
One more case when DVB-T2 signal can’t be received by a transmitter which is used for analog broadcasting. In this case, using Agsat.T2Map, find the closest transmitter and tune antenna in its direction.
Partially this topic has been touched before. What to do if you have problems with video signal after a strong wind, rain or snow? First of all you need to set the original direction of the antenna or satellite dish. It cannot be excluded that the bad picture is a consequence of obstacles: buildings, branches, trees. If you can, eliminate the problem, for example cut down the branch of the tree that interferes with the signal reception.
What to do in situations where there is no signal on the TV because there are obstacles that you can’t remove? For example your neighbors have built a new building or they have enlarged their house. The easiest way to solve the problem. change the location of the TV antenna or satellite dish.
If the antenna / dish was originally installed correctly, but after the wind has changed its direction, this can also be considered the reason that when you turn on the TV you see the inscription “No signal“.
First of all, you need to adjust the turning angle of the dish or antenna. Pay attention to the direction of your neighbors’ antennas, do the same as theirs. To make the most fine-tuning, use the angle calculator. You can find it on the official website of the provider. First enter the location data. To get the most accurate information, use information from the GPS of your smartphone. The program will automatically calculate in which direction you need to point the antenna to increase the quality of signal reception.
Sometimes the picture quality can be degraded noticeably just in case of heavy rain or wind. This is a very natural phenomenon. Bad weather affects the quality of the signal. Unfortunately, you are unlikely to achieve perfect picture quality. You can try to move the antenna or dish in a more reliable place, if it corresponds to the values obtained by using the angle calculator.
TV says no signal: what to do?
We continue to add to our blog Funduk.ua with useful tips for all occasions. And today we will talk about a common problem, which sooner or later faces most of the owners of TV-panels. TV shows “no signal”. What to do in this situation, how to cope independently without calling specialists, where to look for the root of the problem? All these questions you will find us in one article.
Why the TV shows “no signal”?
There can be many reasons for this kind of malfunction, but all of them can be divided into three groups conditionally:
Preventive maintenance at the TV provider;
In fact, you can affect the causes that have occurred in your equipment. And that is what we will begin to deal with first.
The first thing to do if the TV says “no signal“. Check your own devices. The problem can be hidden in the connection cables (starting from the broken connector and ending with a failure), in the TV ports, a satellite dish, satellite converter antenna.
You should start checking the equipment by checking the connection of wires. it is quite possible that the cable has simply come out of the connector. If that didn’t work and the TV still refuses to work, you should clean the ports and connectors of dirt/oxidation, and then check the continuity of the wire for defects. not just the cable itself, but also its plugs.
The second common reason why the TV says “no signal. problems with the satellite dish. If you use it you need to check it for contamination, frosting, snow or dusting, and if necessary clean the surface. It is not superfluous to check the device on the correct position in space. To find out how exactly should your antenna be pointed, you can in the user manual.
In addition, the problem may lie in the satellite convector, which performs the function of the regulator and transmitter. For starters try to reset your device. Alas, if this does not work and if the problem is not caused by wires and the cleanliness/position of the antenna, it is likely that some part of the equipment is out of order. To check which is which, you will need special equipment, another convector, TV and antenna. So it is much easier and cheaper to find a problem with the help of an experienced technician.
Most often the cause of this malfunction is technical work. In this case your only option is to. Wait until the maintenance work comes to an end. Identify that you’re caught during preventive maintenance is very simple. in this case, the inscription “no signal” will be visible not only when you turn on your TV, but also in the menu of your receiver.
Alternatively, you can contact your service provider’s Support to confirm the work and to find out when the work will be completed.
External factors can be the cause of the lack of signal on the TV in the case when you first turn on the devices, change their position, or the situation around you has changed significantly (for example, construction of a new high-rise building is going on nearby).
What to do in this case? You need to try to fix the problem yourself (for example if it’s a tree. you can cut down the interfering tree branches), or move the antenna to another place. In case you cannot cope with the problem by your own efforts, you can call the technical support service, its specialists will quickly cope with the problem.
Software malfunction of the equipment you are using
Do not forget about the fact that problems with the signal can occur because of the software error in the equipment you use. This is especially true for those who use Smart TV. Really, software malfunctions are very common thing, however they can be quickly fixed.
Creator of the Smart TV firmware you’re using may have released an update that allows you to fix the existing malfunction. It is important to note that the update must be performed for all devices.
In most cases in TVs that support Smart TV all the necessary updates are performed automatically. However, there can be certain circumstances in which the automatic update will not happen. If this happens then the update is required to perform manually.
- Connect the Internet to your TV, it can be either Wi-Fi or cable Internet, making all the necessary settings in this case.
- Using the remote control, go to the menu of your TV and find the section for the update (usually located in the Support section).
- Click on Software Update, then the system will search for available updates on the internet, if it finds one, it will notify you. Next, you will just need to confirm the installation of the upgrade.
- You only need to wait a little while for the update to be installed on your TV, after which the device will reboot itself. After rebooting the TV should appear signal. In some cases, you may also need to configure the channels again.
In case the signal does not appear after the above operations, then the problem most likely lies in something else entirely.
As you can see, there can be a large number of reasons that can lead to the fact that the signal will simply be absent. Often it is not easy to figure out what caused this problem. Therefore, if you were not able to quickly find the cause of this situation using the above recommendations, in this case it is best to either call your ISP, or call your TV handyman.
TV Repair at Home. This is a very wise decision in this case, as trusting the search for problems real professionals in this matter you can be absolutely sure that all the problems will be resolved in a short time.
You can always order the services of telemasters in our company. Just call us using phone numbers listed on our website or leave an application on our website with your contact information, after which our experts will call you. They will answer all your questions and offer the most suitable solution for your specific situation.
The reason on the provider side: preventive or repair work
If you use digital, cable or satellite TV from your provider (you pay for TV separately) and you’ve lost the signal, it’s possible that the company’s specialists are repairing the trimmer’s line or upgrading the equipment. How to find out about technical works? Call your provider. it’s the fastest and most reliable way.
Call your ISP’s trimmer hotline to find out if technical work is underway
Of course, you can open the official website of the provider and look at the information there. in the news section. But they don’t always post the information, so you’re better off calling right away. If the work is really in progress, you will be told when it is due to be completed. If everything is OK on the line, you’ll be advised on the issue. told what you need to do to get the signal back yourself. If home measures don’t help, call the hot line for your trimmer again and call a handyman at home.
If you are unable to call your ISP right now, do the following:
- Get the remote from your TV or set-top box.
- Click on the Menu button.
- Check to see if there is a no-signal alert on the menu. If they are, but the channels are not turning on, it means that the cause is on the ISP’s side.
What to Remember
If there is no signal on your TV, do the following:
- If there is no signal, first make sure the provider is not doing any repair work.
- Diagnose the condition of the cable, antenna, correctness of the TV, receiver.
- Make sure you update the Smart TV firmware in time.
Do not repair your TV, receiver, dish without qualification and skills.