Sure, I'd be happy to help you test your LED Xmas lights! Here's how you can do it:
First, make sure that the lights are connected to a power source and that they are turned on.
Next, look at each individual bulb or string of lights to check if they are working properly. If one bulb is not working, you can try replacing it or checking the connection to the socket.
Finally, if all the bulbs are working but the lights still aren't lighting up, check the power supply and make sure it is properly plugged in.