how to fix christmas lights on tree

Oh no, the lights on the Christmas tree have stopped working! Let's see if we can fix them. First, we need to check if the problem is with the lights themselves or the wiring. To do that, we can try plugging in a different set of lights to see if they work. If the new lights work, then the issue is with the old ones. We can then try changing the bulbs one by one to see which one is causing the problem. If that doesn't work, we can check the wiring for any loose connections.