Well, I'm here to help with that! To repair LED Christmas tree lights, you'll need to locate the broken bulb or wire. First, unplug the light string to avoid electrocution. Next, find the bulb or wire that's causing the issue and replace it with a new one. If the problem persists, check the connection between the socket and the wire to ensure it's secure. Finally, test the lights to see if they're working properly. With these steps, you should be able to repair your LED Christmas tree lights in no time. Happy holidays!