Description of the purpose of switching power supply

With the rapid development of power electronic technology and switching industry, power electronic equipment h......

Fundamentals of electronic components

The most basic function of electronic components is to block the flow of current. The two most basic parameter......

No display after startup (blue screen of TV)

Check whether the power indicator of TV or set-top box is on; Check whether both ends of cable TV signal line ......

Can one set-top box be connected to two televisions?

There are two AV outlets on the back panel of the set-top box, which can connect two TVs at the same time. How......

Why is there no sound or image after the set-top box is turned on?

Please check whether your set-top box now displays time or number (if the time is displayed, press the standby......