What if the TV set-top box has no signal?

It is a common problem that TV set-top boxes have no signal, but many people don't know how to solve it. This paper will introduce several situations and solutions of no signal in set-top box for everyone.

Audio and video cable connection problems

When the set-top box startup screen appears on the TV screen, and then prompts "No signal", it usually means that the audio and video cable (red, yellow and white) connection between the set-top box and the TV is stable. However, the RF input signal lines of the TV (note: not red, yellow and white) may not be correctly connected to the RF input port of the set-top box, or the RF input signal lines of the TV may not be connected to the wall junction box, or there may be an open circuit problem in the room.

TV channel setting problem

If the set-top box startup screen does not appear on the TV screen, only the blue screen is displayed without any text prompts, which may be because the TV channel is set incorrectly. At this time, please use the TV remote control to press the source key or av/tv key to switch the TV from the analog TV channel to the video channel.

Power supply problem of set-top box

If the digital TV set-top box can't work normally and the TV shows no signal, first check whether the power light in front of the set-top box is on. If the power light is not on, please check whether the power plug of the set-top box is plugged in (to ensure that the socket has electricity) or whether the switch of the set-top box is turned on.