Half of my Christmas tree lights (4 strands) went out. How do I fix it?
If the entire strand went out, that is typically caused by a fuse. There are typically 2 or more separate sets of lights in each strand, so if just a portion of the lights are out, that typically means a bulb is broken or missing (most new ones still work when the bulb is burnt out). In your case especially, I would suggest checking the fuses on the first strand that is burnt out. You should not connect more than 3-4 strands together, because they will draw too much current and either blow a fuse or cause a fire.
