Check if your laptop USB-C port supports display and power delivery 2 in 1, if the port does not support it, Please use the included HDMI cable and USB-C to USB-A cable(or Type-c cable) to connect the screen expansion.
The power of some models of laptops cannot reach the standard power of the screen expansion. Please use the included USB-C cable to connect the Charging plug, and connect to the Type-c port of the screen expansion to power the screen.