+18 How To Fix A Section Of Christmas Lights 2023. Check for corroded light sockets. Usually, changing a problem bulb (or tightening it) will fix the entire strand.

Make sure there is power at the electrical outlet. If a section of the light string isn’t working, there might be a bad bulb or a bad connection between the bulb and the. It's easy and let's show you the right tools to fix them.