1, external hardware problem
This includes the power supply problem of TV set-top box, poor signal line contact and TV hardware failure. First, check whether the power cord of the TV set-top box is connected stably. If the power cord is damaged or shorted, it needs to be replaced with a new one. Secondly, check whether the power socket of the TV set-top box has electricity. If there is no electricity, you may need to find a professional electrician to repair it.
2. Internal software problems
Software failure of TV set-top box can also lead to no signal, such as system crash, software conflict or system setting error.
3. Signal source problem
If the quality of the signal source is not good, or there is something wrong with the line of the signal source, the TV set-top box will not be able to receive the signal. Check whether the signal wire of the TV set-top box is in good contact. If the contact is poor, you can try plugging and unplugging the signal line again or replacing it with a new one. If there is nothing wrong with the signal line, but there is still no signal on the TV set-top box, it may be that there is something wrong with the TV hardware and it needs to be repaired by professionals.
Matters needing attention in using set-top box
1, shut down in time after use.
We are used to leaving the set-top box on all the time. Even if the TV is turned off, the set-top box is always connected to the power supply, and sometimes even the switch will not be turned off. This causes the set-top box to be in standby state, and the set-top box is in standby state or running. Long-term operation is easy to make the components of the set-top box heat up and shorten the service life of the set-top box.
Therefore, after turning off the TV, we'd better turn off the set-top box. In addition to turning off the power supply, it is best to unplug the power supply at the same time so that the set-top box has enough cooling time.
2. Be sure to turn off the set-top box in thunderstorm weather.
In a thunderstorm, we always remember to turn off the important electrical appliances in our home and unplug them, but it is easy to forget to unplug the set-top box, and sometimes we don't even turn off the switch, which will easily lead to lightning and burn the set-top box. During a thunderstorm, the voltage is very unstable. If you don't turn off the set-top box, the parts of the set-top box will be damaged due to unstable voltage, so you must remember to turn off the set-top box when you encounter a thunderstorm.