First, check whether there is any problem with the signal source input of the TV, that is, check whether the connection between the TV and the cable set-top box is normal. If there is looseness or poor contact, reconnect it firmly. Assuming that the TV is directly connected to the cable TV signal line, it is only necessary to check whether the antenna interface of the TV is normally and stably connected to the signal line.
Secondly, check whether the signal source mode of the TV set has been correctly switched. If the signal is input through the antenna interface, the signal source should be switched to the TV mode. If the signal is input through the AV interface, it should be switched to the AV mode.
Third, after confirming that there is no problem with the signal source input and signal source mode, the screen still shows no signal. It is generally judged that there is something wrong with the TV or set-top box, so you should contact the TV for after-sales maintenance.
Extended content
After-sales service content of electrical appliances
1 to install and debug products for consumers;
The service content is diversified.
2, according to the requirements of consumers, provide technical guidance on the use and other aspects;
3. Ensure the supply of maintenance spare parts;
4, responsible for maintenance services, and provide regular maintenance and maintenance;
5. Call or visit consumers regularly;
6. Implement "three guarantees" for products, namely, guaranteed repair, replacement and return (many people think that the after-sales service of products is "three guarantees", which is a narrow understanding);
7. Handle letters, visits and telephone complaints from consumers and answer their inquiries. At the same time, collect consumers' opinions on product quality through various ways, and make timely improvements according to the situation.
References:
Specific content of after-sales service of Baidu Baike Electric Appliances