dvb t2 is not working today. Why the set-top box for digital television dvb-t2 does not find TV channels

Everyone who lives in the age high technology, are confident that these technologies are designed to make life easier. This is true, although there are situations that can contribute to nervous tension rather than relaxation. For example, when some of your favorite TV channels disappear. Naturally, this is far from the most best experience, especially when you want to watch TV, and it throws up similar, not very pleasant surprises.

If you also encounter a similar problem, then there is no need to rush to a television repairman, especially since this may take some time. If you wish, you can try to restore digital channels on TV on your own. Of course, a 100% return of their broadcast cannot be guaranteed, but, as a rule, independent manipulations help.

Reasons for missing channels

As a rule, the TV shows two dozen standard digital channels. But sometimes even they disappear, if not completely, then partially. Considering that they are free, problems with broadcasting can be associated with many reasons, but the main ones can still be identified:

Problems with the program;

Problems with the signal receiving equipment.

Both the first and second situations can be solved, but they require completely different manipulations. If the problem is with the equipment, then the attempts of an ordinary user do not always help, and can even cause harm. If there is a problem with the TV channel itself, then this happens with one, maximum, two programs, but not with half of the broadcast channels at once.

Let's figure out what the number represents before doing any manipulations related to recovery processes. So, the advantages of channels digital television consist of improved signal reception, cooler sound, picture and other characteristics compared to others free systems. But only 20 channels are free, which are periodically switched off and changed, so in a situation where some TV channels have disappeared, there is nothing surprising.

A paid channel symbol appeared on the screen. This is a sign that the subscription to services is ending. If you didn’t pay for your digital subscription on time, the answer to the question of why the channels on your digital set-top box disappeared is obvious. You need to top up your account and then they will start working again, of course, if this message does not pop up on. In this case, it is better to contact your provider for clarification;

There may also be difficulties with the software, or more precisely, its compatibility. If this is a GS-HD receiver, then you need to go to the menu and press the “Restore channel list” button. If the new one doesn't fit software, then on the same receiver you need to: find the TV/RADIO and CHANNEL buttons on the remote control, in addition, simultaneously press the same buttons on the receiver panel. But it is very important to do this at the same time. Then press the STANDBY button on the remote control;

The inscription “No signal”. This is already a standard sign of problems with the antenna. If the antenna does not work as it should, it is not surprising that dozens of channels began to disappear. If the device is new, then it may not have configured programs, so this fact should be clarified. But if the programs worked before, but disappeared in an instant, you should still go outside and see if the antenna has moved due to strong wind or something similar;

Sometimes the connection between the antenna and the cable, or the cable and the set-top box, is disrupted. If such suspicions arise, you need to make sure that the cable is connected to the LNB IN socket.

When none of the above list helps, there is only one way out - call for help. The master will definitely figure out what’s wrong and return your favorite programs.

Why are only 10 out of 20 digital channels shown?

Over the past two or three years, digital television users have often complained that after updating channels, half of the programs that were shown before disappear. Since then, people have a logical question: why did 10 channels disappear if they used to work and were free?

Many forums are trying to find out the answer to this question, which is why different versions are put forward. For some, the channels of the first multiplex do not work, for others, the second. This suggests that the reasons for these troubles lie in various signal reception difficulties associated with technical work or features of the functioning of digital television.

Perhaps after some time the channels will restore their broadcasting, so you shouldn’t worry in advance about where ten popular channels have disappeared at once. RTRS clarifies that for now the work is being carried out in test mode, so for some regions such difficulties will become the norm. Sometimes searching for channels again or reflashing the set-top box helps, but if this is not your case, you can use analog or satellite television, where the signal works without such significant interruptions.

If, as a result of the search, only 10 digital channels are found instead of the desired 20, then first of all you should make sure that viewing all channels in your location is in principle possible. This can be done by using, interviewing neighbors, or calling specialized organizations involved in installing antenna equipment. You should not call Eldorado or Auchan, since in most cases they do not have such information. Call a company that specializes in installing antennas. As a rule, these are companies that also install satellite dishes, and you can find their coordinates, for example, on the website tricolor.tv in the “Where to buy” section. If reception of all 20 channels is possible in your area, check the antenna and cable.

Channels freeze or signal disappears

For stable operation of digital television, it is important that the received signal is of sufficient level. More precisely, a good signal-to-noise ratio is important. When this ratio drops below a certain limit, viewing problems begin. The easiest way to see the signal level is to double-press the INFO button on the problem channel on the remote control of the DVB-T2 set-top box. A “quality” scale should appear on the screen and its value should be as high as 50%. Often, next to the signal scale, a “level” or “strength” scale is displayed - there is no need to focus on it. If the signal level is low, then the advice is still the same: check the cables and antenna and, if necessary, replace it.

The systematic shutdown of analogue television broadcasting in favor of digital broadcasting is in full swing. Digital TV is not only high quality broadcast image and sound, but also stable broadcasting. However, sometimes problems with television still arise. As a result, the device does not pick up digital channels.

When you first start the receiver, the user configures TV channels. Mostly this process is carried out automatically. However, what should you do if, due to a poor signal on your TV, you cannot tune in to the channels included in two free multiplexes?

There may actually be several reasons. These are the ones we will talk about now. Let us carefully consider the main difficulties that users face in order to answer the question of why digital television does not show today. Let's give real arguments and effective ways solutions to emerging problems.

Reasons why digital channels are not shown

Conventionally, all reasons can be divided into 4 categories:

• hardware or software failure of the equipment;
• carrying out repair work;
• natural factor;
• termination of broadcast.

Of course, you first need to determine why digital television does not work. Diagnosis comes down to studying the symptoms, for example, if the image becomes square or the sound is delayed, this may be a consequence of bad weather or a thunderstorm.

It is almost impossible to avoid the listed problems, since for the most part they are of a force majeure nature. The only exception is equipment failure. Preventing software failures is quite simple - update promptly operating system consoles. With hardware damage is even easier - follow the rules for operating the equipment.

Now we will take a closer look at what the quality of broadcasting depends on, and we will also determine why there is no signal on digital television. Let's focus on the most common reasons that have already been voiced earlier.

The equipment has failed

If cable television does not work, then first you need to figure out what exactly caused the failure:

• receiver failure;
• antenna damage;
• cable fault.

First, let's deal with incorrect operation digital set-top box. There is no point in focusing too much attention on this point, since the symptoms of a receiver failure are obvious. When the receiver is turned on, the indicators indicating that the equipment is starting up will not light up. Sometimes the LED lights up, but it's extremely dim.

Many tuners are equipped independent block 5 Volt power supply. Most set-top boxes are equipped with a standard adapter, so checking its functionality is extremely easy; you can connect a similar component from the router.

In some situations, testing the voltage level with a multimeter does not give results, since in the absence of loads the measurement will show the 5 Volts established by the regulations.

Poor sound from the DVB-T2 tuner is another symptom. Sometimes the device simply reboots or turns off randomly and does not respond to commands from remote control management.

Another common type of hardware problem is faulty cables and connections. As a result, absolutely all channels are not shown because the signal is lost. Carefully check absolutely all connections and cable integrity.

Particular attention should be paid to the white wire (RG-6), which is intended for internal installation. The service life of this cable is extremely short, especially if you used it during external installation. Water gets into it, thereby destroying the braid.

The third reason for problems with equipment is a malfunction of the antenna. Indoor antennas They fail extremely rarely, unlike external ones. Predominantly, the catalyst for failure is precipitation or thunderstorms. You can try to reconfigure the receiver several times, but the channels will not be found. In this case, follow the proven algorithm of actions:

1. Check the cable and plugs.
2. Assess the voltage supply from the set-top box or power adapter.
3. Connect the new antenna.

Remember, if for some reason the antenna does not pick up channels, check whether it is really aimed at the signal transmitter.

All the previously listed factors fully explain why the TV does not pick up channels. Modern models TVs are equipped with built-in T2 set-top boxes, which also sometimes fail.

Bad weather

If you have ever dealt with satellite TV, then you probably know that during rain or heavy snow, the picture literally crumbles into squares or disappears altogether. With digital DVB television Similar problems occur when there is excessive precipitation.

A weak signal reaches the receiver from the antenna, which is why the TV does not show well in bad weather. Determining this problem is extremely simple; you just need to test the signal level. If there is no digital television signal or it is very weak, it is necessary to increase it, mainly for this additional devices are used - amplifiers.

Termination of broadcast

If digital TV channels do not work due to preventive maintenance, then go to the website rtrs.ru, information about the time and duration of such events is displayed here. In addition, a sign with a corresponding notification will appear on the TV screen.

Sometimes the receiver catches only 10 channels of the first multiplex, but just yesterday there was broadcasting of the second package. In this case, check its signal level. If it is zero, then most likely the second multiplex is simply disabled. This is mainly due to broadcasting in test mode. After the equipment collected the information, the TV channels disappeared.

As mentioned earlier, the first multiplex is mandatory, so it works correctly throughout almost the entire territory of Russia. There are certain difficulties with the second multiplex. They are largely due to a lack of funding. In addition, in some regions analogue TV is still active, so there are simply not enough free frequencies.

A complete abandonment of analogue television broadcasting will contribute to the speedy emergence of a second multiplex in all regions of Russia.

Repair work

We have already established why the digital television signal disappears; the reasons can be really different. For example, sometimes during the day the TV does not work due to regular or force majeure repair work. You can also find out about this by visiting the website rtrs.ru. They are often carried out after severe bad weather, which causes the breakdown of equipment located on the tower.

Ostankino tower broadcasting has finally switched to the new DVB-T2 standard - digital channels are no longer shown in DVB-T format. Residents of the city of Moscow and the Moscow region have been turned off broadcasting since January 15, 2015; the analogue band continues to be broadcast in normal mode. The loss is connected with the program “Development of television and radio broadcasting in the Russian Federation for 2009-2015”, signed by Dmitry Medvedev back in 2009. The point is to switch to digital system with analogue, this will make it possible to receive high-quality broadcasts in all regions of Russia. The televisions of most TV viewers from the outback do not show more than one or two programs, and if they do, the quality of the picture leaves much to be desired. The transition program will be implemented in stages and until more than 95 percent of viewers are ready to accept digital, complete shutdown analogue will not happen. TVs that only support DVB-T will not be able to receive 10 digital channels. Those who have lost digital channels will need a built-in DVB-T2 tuner or a digital set-top box to watch terrestrial television. Previously installed antenna, does not require replacement.

Digital broadcasting in DVB-T has disappeared

What to do if digital channels disappear? It is not necessary to change the TV, especially since most often it was purchased not so long ago. You need to buy a special tuner and connect it to your blue screen using an HDMI or RCA cable (tulips, bells). It's bad that it will stand additional device next to the TV and you will have to use two remote controls, but it is still cheaper than buying a new one. Digital channels are not shown on old-style tuners; please note that the specifications indicate DVB-T2. Number of main federal programs reached twenty, in the future their number will increase.

At the beginning of 2015, it consistently shows 20 channels, two of which are broadcast in high quality high resolution HD – First HD and Russia HD. To view HD, the connection must be made using an HDMI cable, not RCA (tulips) or SCART (comb). Another 10 channels are received in test mode. Total – in Moscow and the Moscow region shows 20-30 digital channels, only disappeared in DVB-T. must be carried out by specialists with professional instruments and equipment. You can call a specialist from us, service area is Moscow and the Moscow region.

The fact that digital television provides an image on the screen best quality, how analog signal, many of our compatriots have already been able to verify.

In order for your home to be able to receive digital channels, you need:

- a regular decimeter antenna;

- reception DVB set-top box T2, or receiver;

— a television tower transmitting a signal in DVB T2 format, within the reach of the antenna.

So, you have all this installed, connected (except for the tower, of course) and even worked for a while, but suddenly the signal disappeared. What could be the reason and how can I fix it on my own?

No signal from TV tower

Sometimes the lack of a signal is explained by the simplest reason - the TV tower is not transmitting it at the moment. For example, maintenance work is being carried out or equipment malfunctions have forced the broadcast to be suspended and repairs to be carried out in earnest.

Digital television is still a fairly new direction, so the signal transmission process is not ideal everywhere, and there are failures and breakdowns of equipment.

Poor signal reception conditions

In the event that the signal is received on a weak antenna without an amplifier or with a low-power amplifier, or in the space between the antenna and the television tower there are high rise buildings or other interference-producing structures, the signal may periodically disappear when atmospheric conditions deteriorate.


In other words, during rain, thick fog or snowfall, severe signal interference occurs. In this case, purchasing more powerful antenna or moving the existing antenna to the highest possible height to ensure direct visibility of the tower.

This is easy to do if you mount the antenna on the roof multi-storey building, in which you live. If this is not possible, then you need to buy an antenna with a powerful amplifier.

Receiver failure

Inexpensive consoles made in China from time to time they can present similar surprises - spontaneously disconnect from signal reception. In this case, the following message appears on the screen: “No signal.”

The simplest action - turning off, and after a few seconds turning on the digital set-top box - often returns the set-top box to working condition.

Poor quality receiver firmware

This defect is most typical, again, for inexpensive Chinese equipment. The only way out is to flash the console's processor.


You can download the required firmware version from the receiver manufacturer's website, but it is not so easy to do this at home and without certain skills. Most likely, you will have to contact a workshop for this.

Spontaneous reset

Sometimes technology presents such surprises as failure of channel settings. In order to restore the settings, you just need to run auto search, and all available channels will be restored in a few minutes.

Problems begin when the auto search could not find a single channel. In this case, you should repeat the search manually and make sure that there are no even weak signals, which are usually ignored by the auto search.

To check the signal level, you need to find the “INFO” button on the remote control and press it three times in a row - the screen should display information about the signal strength as a percentage of the required one. If the signal is really very weak, you will have to buy an amplifier or move the antenna higher.

Set-top box malfunction

The simplest and most obvious case is that the console has failed for some reason. This could be a power surge, a lightning strike on an antenna on the roof, etc.


, most likely, does not display any messages on the screen at all, even about the absence of a signal. It may not even turn on. In this case, only contacting a repair shop or buying a new receiver will help.