Slide this door open pry out the small glass fuse and examine it closely.
Christmas tree lights string out.
One light goes out rest stay lit is a technology that uses an internal shunt within the bulb to continue the flow of electricity throughout a light string even if a bulb has burned out.
You may find that the bulb has a black or silver looking stain on the inside.
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It is important to understand that if the shunt is broken when a bulb breaks or if it is dislodged due to a loose bulb the flow of electricity will stop.
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If this is your problem carefully replace the bulb after first unplugging the string of lights.
Modern sets of mini lights have a small cartridge fuse found in the cord plug inside a small sliding door.
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When an entire panel of lights is out the reason is almost never a single burnt out bulb unless that bulb s shunt is also broken.
Buying christmas light replacement bulbs should always be your last step.
Modern string lights have shunts to redirect the flow of electricity when a bulb burns out so only the individual light bulb is affected.
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Step 1 check the entire strand of lights for a missing damaged or abnormal looking bulb according to the christmas light company website.
Check the fuse on the light string.
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