Q: How to check USB-C port on laptop is an full-function port or not ?
A: If your laptop has a full function port as the above picture symbols (Thunderbolt 3, Thunderbolt 4, DP 1.2),It means the USB-C port is function can support power and video signal. (You also can online check laptop port parameters)
Q : What should I do when it shows "No Signal" on display ?
A :1> If plug USB C to C cable show no signal, You can plug extra USB A to C (5V/2A)cable or HDMI to mini HDMI cable( Some USB-C ports are on laptops not full function only support power or video signal) .
2>If plug USB A to C cable show no signal , You can plug extra HDMI to mini HDMI cable.
3>If plug HDMI to mini HDMI cable show no signal , You can plug extra USB A to C cable .
Q : What should I do when "Flickers & Black Screen" happen ?
A : Caused by low battery or insufficient voltage of your laptop, try an external 5V/2A adapter with cable offer power for monitor.
Q : Why does the monitor not light up after connecting?
A : Monitor can not light up always caused by laptop can not offer enough power . Please try an extra 5V/2A adapter with cable offer power for monitor. Also active your laptop screen to avoid extender screen into sleep mode.