LED stands for light emitting diode and refers to a lighting element that is purer and stronger than regular incandescent light. LED lights are commonly found in long strings of lights used at Christmas and other holidays for decoration. You may find that some LEDs stop working, and this causes many people to dispose of the entire string. You can easily repair your string of LEDs by switching out the faulty ones.
Wrap a small piece of electrical tape on each light that isn't working with the lights turned on. This way you can see which LEDs aren’t lit.
Turn off the power running to the lights and unplug the lights.
Pull out the first light that is marked with tape from the light fixture. Grasp the LED above the plastic covering and pull it until it releases from the fixture.
Take the LED to a lighting supply store and have them give you a match for your exact LED. Buy as many as you need to replace your lights.
Insert the plastic and metal end of the LED into the socket you pulled it out of until it is firmly in place. The plastic covering of the lamp should be pointing away from the socket.
Replace all of the other marked lamps in the same way.
Turn the electricity back on and plug the lights back into the power.