Malfunctioning Pre-lit Tree?

I need some electrical help! I am trying to replace burnt out bulbs on my tree. However with one row of branches, every time I replace a bulb, the whole branch turns off. I have even tried putting the old burnt bulb back in, the one that still kept the whole strand on the branch working originally, and it still won't turn the rest of the strand on that particular branch back on :(


I gave up on the one branch and found another burnt out bulb on the branch beside it. Guess what happened when I replaced it? Yup, you guess it, I broke the whole strand on that branch too. I thought it was just a fluke and said I'll just throw that end of the tree up against the wall, but I still didn't learn. I found one more burnt out bulb on the next branch over... and yup, I broke that strand too.

Now I'm stuck with 3 dark branches and it stands out, badly.Can anyone tell me what I'm doing wrong? Please help! This tree is for a unit I work on at the hospital. My good deed is driving me crazy :p

By SincerelyReallyFrustrated

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December 1, 20143 found this helpful
Best Answer

I'm not an expert, but I was having a similar issue and finally broke down and bought a Light Keeper Pro from Home Depot for $20. Problem solved! Very easy to use, and paid for itself within 5 minutes. Now I'm going back to all my old decorations that use mini lights and fixing them, too.


Hope it helps. Good luck!

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January 2, 20170 found this helpful

What exactly does the Light Keeper Pro do ?

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December 5, 20170 found this helpful

The Light keeper Pro hasnt helped me. : (

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December 13, 20180 found this helpful

Amazing. I thought it had to be a joke, but I read the reviews and I was faced with 8-10 dark strings. I popped for the $20 and fixed every string in less than 1 minute each. Seldom does a product do exactly what it says it will like this one does.

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December 15, 20180 found this helpful

Well, I bought the Light Keeper Pro as well. Watched all the videos, read all the literature, but it didn't work for me. I believe I've tried everything they suggested several times and it doesn't do a thing.


After spending six hours trying to get that one section to light, I'm ready to throw the tree out and pack everything back up and forget Christmas.

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December 15, 20180 found this helpful

So after writing the post above, I found that the Light Keeper Pro can fix most anything except for the dummy factor. I had removed a bulb from the tree before I put it away last year because that's where I plug in one of those rotating ornament things. The LK Pro did send me to the general area where I finally where a bulb was missing. I replaced it and the lights then worked. Duh!

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December 2, 20141 found this helpful
Best Answer

I saw the answer above and purchase the Light Keeper Pro from Home Depot for $20+tax. Just as above Problem solved! Very easy to use, and paid for itself within 5 minutes.


There were 9 bulbs out with 3 burnt shunts (keeping the string dead). It would have taken an hour to solve if I was able to get them all out of the string. Wow.

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November 12, 20170 found this helpful

How did the Light Keeper help you in this instance? i'm having the same problem with my tree... spent hours replacing burnt bulbs, half of the section lit up again. replaced the next one over and it blew them all again! Same thing in another section of the tree. I'm using the light keeper but am at a loss on how to prevent this! Please help!

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December 6, 20140 found this helpful

I, too, purchased a LightKeeper Pro, but it doesn't take care of burnt out bulbs! And does anyone know why an entire string burns out? I have a pre-lit tree with multiple strings where all of the bulbs look burnt out.


I did not plug in anything extra that would draw current. Does anyone have a solution other than stringing new lights?! Please help!

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January 26, 20170 found this helpful

It happened the same to me. By serendipity I found this explanation in a web site: The reason could be that we used a bulb from another string or one that didn't exactly matched the amp of the tree lights and we burned them! The replacements must be extra bulbs from the tree itself or similar. If we use higher power -amps- we burn the whole thing. Now that I have read about these other ideas, I'm going to try them.

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December 18, 20171 found this helpful

I have a Thomas Kincade Christmas tree it was prelit and beautiful with the lights when it was new after about 4 years it wouldn't light anymore no matter what I tried. I tried putting the new starter white bulbs in and trying to see if any bulbs would light and the warranty was off the tree which was a 1 year warranty.


I wound up buying all new lights for it and taking the prelit kind off and it was quite a job to do, I then put on the new lights on and used plastic wire the put the lights on and it works beautifully. It was quite a job though but I am glad I did it. I would advise everyone not to get a prelit tree after my experience.

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