I hade the same problem on a set of ge led lights.
Led christmas lights half strand out.
As the link cannot carry on further than the busted bulb.
If after all the testing the light string still doesn t illuminate it s time to get some new lights.
There was no way i was going to replace the entire string so i went online to see what kind of solution might present itself.
The christmas light tester will indicate which bulbs are bad and need to be replaced.
If this is your problem carefully replace the bulb after first unplugging the string of lights.
Second half of strand was out.
I ve never worked with that brand of lighting before but usually with christmas lights the are all interlinked as a loop circuit so the first one that is out is usually the cause of the problem.
Check the entire strand of lights for a missing damaged or abnormal looking bulb according to the christmas light company website.
Sixty bulb led christmas lights are built from two half strings of 30 bulbs each.
And if you re buying new lights consider upgrading to led christmas lights.
I put a new bulb in and boom fixed.
Incandescent christmas tree lights aka mini lights are wired in series so if your lights go partially out you have one of three issues.
I took out each light staring at the end and i found one with a wire broken off of the bulb.
People actually suggested cutting out the offending half string and patching in another one.
You may find that the bulb has a black or silver looking stain on the inside.
Some christmas light testers work by having you slide each christmas light bulb through a hole.
The first several search results made me gag.
I d try and replace the first dead bulb or if you can t find replacements you could try just linking the connectors by shorting them and.