Many set-top box users report to the author that their set-top boxes sometimes have no signal. For example, watching a TV program suddenly has no signal, or there is no signal to open a set-top box. How can this be good, and are they still waiting to watch TV programs? Here I teach you a few steps to solve the set-top box no signal method.
Set top box is divided into several types
It is often said that set-top boxes can be roughly divided into two types, digital television set-top boxes and Internet TV set-top boxes. The working principle of the digital television set-top box is to convert digital signals into television signals, which generally require cable cables, satellite antennas, etc. to transmit signals; the network television set-top boxes are used to play content by converting network signals into television signals.
Because there are different types of set-top boxes, the solution to digital TV set-top boxes and network TV set-top boxes may be different when the same set of problems is encountered. For example, common set-top boxes have no signal problems. Look at the solutions to the following specific problems.
The first move: check whether the set-top box is powered (common for digital and network set-top boxes)
Phenomenon: The set-top box turns on the power switch, but the TV does not have a signal and there is no startup screen.
Solution: It may be that the power of the set-top box is not turned on. When the author touched the set-top box, he also made the same mistake and forgot to plug in the power of the set-top box, or the outlet switch button did not turn on to make the set-top box not work normally. Therefore, the set-top box has no signal.
The second measure: whether the set-top box RF signal connection is smooth (only for digital TV set-top boxes)
Phenomenon: If the start-up screen of the set-top box appears on the TV screen, the system prompts "No signal". This phenomenon is mostly a problem with the signal line between the set-top box and the TV.
Solution: The above situation only occurs on the digital TV set-top box. First of all, you have to eliminate the audio and video cable (red, yellow, white) connection between the set-top box and the TV. It is most likely that the TV RF input signal cable is not received. The set-top box RF input port, or TV RF input signal line is not connected to the terminal box on the wall, or there are other disconnected places in your room.
The third measure: set-top box AV/TV settings (for digital TV set-top boxes only)
Phenomenon: If the start-up image of the set-top box does not appear on the TV screen, then only the blue screen does not have any text prompts
Solution: There is a problem with the TV's channel settings. Use the TV's remote control to press the source button or the AV/TV button to switch the TV from the analog TV channel to the video channel.
The fourth measure: AV and HDMI signals are not smooth (applicable to Internet TV set-top boxes only)
Phenomenon: If the start-up image of the set-top box does not appear on the TV screen, but the box indicator light is on, then the blue screen does not have any text prompts.
Solution: There may be a problem with your TV's signal source settings. Please use the TV's remote control to reset the TV's access source, select the AV source or HDMI source; another possibility is that the AV cable or HDMI HD interface falls off. , Try plugging in the interface to see the effect.
The fifth measure: The set-top box has no signal, but it is not a problem with connection lines, settings, and signal sources.
Solution: If your box is a digital TV set-top box, it may be that there is no money in the TV card. If you eliminate this possibility, then the digital TV set-top box is very likely to have been damaged; if you are an Internet TV set-top box, you may wish to reproduce Change the line to try again, if it still does not work, look for sales, repair.
Set top box is divided into several types
It is often said that set-top boxes can be roughly divided into two types, digital television set-top boxes and Internet TV set-top boxes. The working principle of the digital television set-top box is to convert digital signals into television signals, which generally require cable cables, satellite antennas, etc. to transmit signals; the network television set-top boxes are used to play content by converting network signals into television signals.
Because there are different types of set-top boxes, the solution to digital TV set-top boxes and network TV set-top boxes may be different when the same set of problems is encountered. For example, common set-top boxes have no signal problems. Look at the solutions to the following specific problems.
The first move: check whether the set-top box is powered (common for digital and network set-top boxes)
Phenomenon: The set-top box turns on the power switch, but the TV does not have a signal and there is no startup screen.
Solution: It may be that the power of the set-top box is not turned on. When the author touched the set-top box, he also made the same mistake and forgot to plug in the power of the set-top box, or the outlet switch button did not turn on to make the set-top box not work normally. Therefore, the set-top box has no signal.
The second measure: whether the set-top box RF signal connection is smooth (only for digital TV set-top boxes)
Phenomenon: If the start-up screen of the set-top box appears on the TV screen, the system prompts "No signal". This phenomenon is mostly a problem with the signal line between the set-top box and the TV.
Solution: The above situation only occurs on the digital TV set-top box. First of all, you have to eliminate the audio and video cable (red, yellow, white) connection between the set-top box and the TV. It is most likely that the TV RF input signal cable is not received. The set-top box RF input port, or TV RF input signal line is not connected to the terminal box on the wall, or there are other disconnected places in your room.
The third measure: set-top box AV/TV settings (for digital TV set-top boxes only)
Phenomenon: If the start-up image of the set-top box does not appear on the TV screen, then only the blue screen does not have any text prompts
Solution: There is a problem with the TV's channel settings. Use the TV's remote control to press the source button or the AV/TV button to switch the TV from the analog TV channel to the video channel.
The fourth measure: AV and HDMI signals are not smooth (applicable to Internet TV set-top boxes only)
Phenomenon: If the start-up image of the set-top box does not appear on the TV screen, but the box indicator light is on, then the blue screen does not have any text prompts.
Solution: There may be a problem with your TV's signal source settings. Please use the TV's remote control to reset the TV's access source, select the AV source or HDMI source; another possibility is that the AV cable or HDMI HD interface falls off. , Try plugging in the interface to see the effect.
The fifth measure: The set-top box has no signal, but it is not a problem with connection lines, settings, and signal sources.
Solution: If your box is a digital TV set-top box, it may be that there is no money in the TV card. If you eliminate this possibility, then the digital TV set-top box is very likely to have been damaged; if you are an Internet TV set-top box, you may wish to reproduce Change the line to try again, if it still does not work, look for sales, repair.
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