According to statistics, the most common problem among digital television viewers is the situation when there is no signal on the TV. The inscription can appear both on a digital TV with a built-in DVB-T2 tuner, and on a connected external set-top box (receiver, tuner).
The notification may be slightly different on each TV, but the essence remains the same. Most often the TV says “No signal or weak signal.” Additionally, recommendations are given on what to do: “Check the antenna cable connection” or “Select the signal source.” This gives us a clear understanding of the reason for the inscription on the TV screen.
This means that the problem is either in the signal (the antenna does not work or is simply not connected), or the TV is now set to a different picture mode. In the latter case, for example, instead of terrestrial TV, the display mode via the HDMI interface can be selected.
The appearance of the notification is not affected by the brand of the TV. This applies to all popular brands (Samsung, LG, Philips, Sony, Xiaomi, Toshiba, Dexp and others) and less. It also doesn’t matter whether it’s a regular TV or Smart TV.
What can you do if you have poor internet reception on your mobile phone?
Just like with a landline connection, you first need to understand the reason. If there is no Internet at all, you need to check whether data transfer is active on the device. If the function is disabled, you should simply activate it.
Another possible reason is the connection type. If it is specified incorrectly in the settings, problems with the network may occur. To fix the problem, you need to find the “Mobile networks” sub-item in “Connections” and select the SIM card mode in it.
Next, a list should open with various connection options. You need to check whether the device can connect to LTE. After activating this type, the phone will have the fastest Internet possible in the Moscow region.
Sometimes low speeds may simply be due to running out of traffic. Operators usually report this via SMS. In such a situation, it is enough to pay for additional Internet.
Your phone may need to reboot. Active applications interfere with the normal operation of the device. If you reboot, the speed will be restored.
In remote settlements there is often no wired Internet. Once in a village or country house, some people connect to their smartphone as a router. To provide themselves with the Internet, they use 3G modems.
Among the popular operators are:
- Beeline;
- MTS;
- Megaphone.
If slow mobile Internet does not suit the user, you can fix the problem using a USB extension cable. Just three meters is enough. One end is connected to a 3G modem, the other to a laptop or PC. This method allows you to save money on the purchase of an antenna, which is used to strengthen the operator's signal.
It should be taken into account that the signal quality also depends on the position of the modem in the house. The higher the device, the better the network is caught. If you place the device near a window, the signal will be of better quality.
Not knowing what to do if the mobile Internet is bad, some people decide and buy a special antenna for their apartment. The use of the device allows you to solve the problem even at a distance of 10 km from the nearest station. CDMA antennas are easy to install, so there should be no difficulties in using them.
Such amplifiers can be used not only at home, but also in the car. Devices at 17-24 dBi will work best. However, it should be taken into account that antennas with this range are the most expensive.
Operator repair work
If you use television services provided by your provider, and the set-top box says there is no signal, the provider may be carrying out maintenance or repair work.
When you turn on the digital set-top box, there may be no video signal due to the usual freezing of the equipment. Restart the set-top box and check operation. If this does not help, contact support to clarify the details of the repair work. You can view other notification channels:
- Official website of the provider.
- Information line in a TV set-top box.
- Mailing about work being carried out at the appointed time.
Technical damage
A common reason that there is no signal on the TV is the presence of hardware failures in the equipment connected to the TV. The most common:
- Mechanical damage to the television cable: break, damage to insulation, etc.
- Damage or deformation of the satellite dish/antenna: weather, vandalism or physical aging.
- Problems with the receiver: connector, board, firmware.
Based on the information received, it is necessary to visually examine each component and determine where the technical damage occurred.
Cable
First of all, check whether the cable plug is properly secured in the connector of the TV or set-top box. There is a possibility that weak fixation by the socket is the cause of a weak signal or its complete absence.
If the problem is in the connector, you should firmly secure the cable in it. And if this is not possible due to deformation of the connector or cable, you should re-solder the connector, strip the cable and connect it correctly.
Examine the cable along its entire length to the antenna (to the cabinet with the provider’s equipment). Check the cable for breaks, cuts, exposed insulation and other signs of cable failure. If any are identified, it is recommended to replace the cable or “cure” it using an F-socket to F-socket adapter.
If you have access to an antenna, check the quality of the coaxial cable connection to the antenna. It is important that no damage to the connectors is observed.
Antenna
Take a close look at the antenna. Pay attention to:
- The direction in which the antenna is turned (especially if the nearest repeater is tens of kilometers away). If the wind changes the orientation, try to return it to the correct position. For a satellite dish, a correctly aligned converter is important. If it moves even a fraction, the signal may disappear.
- The condition of the antenna – it may be covered in dust, dirt, snow or covered with ice, or part of it is already rusty. If possible, clean the signal receiving devices, since all these factors negatively affect the signal quality.
- The condition of the brackets and other structures on which the antenna is placed. Perhaps they no longer provide the stable position that the antenna needs.
Receiver
When checking everything else, it still says that there is no digital television signal, check if your DVB-S or DVB-T/C set-top box is letting you down.
Frequent breakdowns of the digital assistant:
- Decoder failure.
- Oxidation or burnout of contacts.
- Power supply failure.
- Failure in the internal memory (hardware or software).
Sometimes, fixing a problem with your current receiver costs more than buying a new one. Re-soldering connectors or regular flashing can pay off if the memory module fails. The remaining damage usually does not pay off, and it is easier to buy a new console.
It is advisable to flash it with native firmware, which is available on television and radio resources on the Internet. You need to select native firmware according to the model of your receiver. If the device is still supported by the developer, flash the latest stable version of the software.
Incorrect source selected
A TV is a device that displays pictures from a source that supplies video and audio signals (or separately). Therefore, you need to make sure that the source from which you now want to display images is specified in the settings. If the source is set incorrectly, the picture simply will not be displayed. Consequently, the device will write that there is no signal.
The button on the control panel is always responsible for selecting the source. It is signed “SOURCE”, “INPUT”, “AV”.
If this button is not there, then you need to press the “HOME” button (indicated by a house icon). Next, select the source menu in the main menu and set the source from which you want to display the picture.
- If you need to watch via HDMI, select the item of the same name.
- When you need to watch digital TV through an antenna, you need to select the item “TV”, “Antenna”, “Broadcast”, “Live TV” or similar.
Not all channels broadcast
If all of the above has been checked and done, and the output of the TV with a satellite receiver and dish produces a weak signal, and in some places there is none at all, perform the initial setup of the receiver to receive a satellite signal:
- Open the menu, select the desired satellite and frequency.
- Information about specific channels can be taken from the “info” information. This data is also available on the Internet, in the public domain.
- Afterwards, select the correct port. Typically, this is a 4-port "DiSEqC".
- If colored stripes appear (signal quality), save the settings.
- Then, set up other satellites in the same way.
If your TV loses signals from the antenna from time to time, the tuner is to blame. More precisely, a decoder that needs to be reflashed. It is important to note that decoder firmware and tuner firmware are two different things. For this purpose, it is recommended to take the tuner to a service center or replace it with a new one.
