⟐ Commented February 19, 2026 at 5:31 MST

We have a 5 foot deer with at least 1000 LED lights that stopped working. The transformer is putting out 24.2 volts - supposed to be 24. The deer has 2 connectors inside, probably splitting the line into thirds. If I disconnect either one, there are 24.2 volts coming out of each. The bulbs are sealed - not able to be unplugged or taken out. Why would the lights not be on?

⟐ Answer accepted January 12, 2026 at 14:18 MST

= Thanks for any help!

=

⟐ Commented December 25, 2025 at 9:32 MST

⟐ Answered February 11, 2025 at 14:09 MST

⟐ Commented January 26, 2025 at 19:56 MST

I have a bunch of Noma LED Christmas light strings, each with 70 LEDs. With one string, exactly half of the LEDs don't light up when plugged into the AC. The whole string used to work, and it's only about a year or two old.

My understanding is that Christmas light strings like these are often two independent circuits, with fuses built into the plugs at either end. I notice that most of the way through the string there are three wires—but at the middle-point of the string, there are only two wires joining the 2 halves. So, this idea that there are actually two independent circuits seems to make sense to me. There must be a fault in the 2nd half of the string, or the fuse in that half must have blown.

My question is this:

Has anybody ever tried repairing this kind of LED Christmas light string? Is it worth it to try replacing the fuse? (Of course, it would only make sense doing so if there wasn't some other more serious fault in the circuit—but how would you debug the cause of the failure?)

The plug at the end with the problem looks like it has a small catch you could push in with a small screwdriver, but it appears almost impossible to pry open the plug without damaging it. Even if I did get the plug open and find the fuse, I'm wondering if the fuse is even some standard size or type that can be readily replaced. Is this just a one-shot type of fuse?

Failing repairing the 2nd half, I might cut the string in two and just insulate and seal the cut end with heat shrink. Has anybody done this to a broken string of LED lights?

⟐ Commented December 29, 2024 at 15:00 MST

I put the bulb into the base from the burnt out bulb.

New bulb's filament shorter than original bulb's.

Voltage different? If so, is new bulb's too high or too low. How to tell bulb voltage?

The light strings that are working at the end of the season are coiled up and placed in totes and placed in a storage shed.

When we have pulled them out and started stringing them we discovered quite a few strings have only half the string working. I have read where the LEDs are steel and can rust and can create an open circuit.

I believe that open circuits don't damage anything else. But, a burned out LED will likely be shorted increasing the current in the circuit. That would be the same as removing the socket from the circuit and soldering the resulting leads together.

Now...Current in a circuit is the same throughout the circuit. So...if you removed or had several LEDs burn out and short, than this circuit would have higher current flow...and if this string was the first in a daisy linked chain of strings...would this endanger the entire length of this chain?

Some of our chains are 20 strings long and some are 40 strings long.

Supposedly this was per manufacturer. So would the higher current flow of the first string raise the current for the entire chain endangering and shortening the life of all those strings?

⟐ Answered November 29, 2024 at 5:56 MST

⟐ Answered August 19, 2024 at 19:44 MST

⟐ Answered January 07, 2024 at 12:43 MST

⟐ Commented December 25, 2023 at 4:34 MST

Using 3 AA batteries in series (4.5vDC) the battery box has a sequence button for various modes. It also times out after six hours and the batteries last about three days.

I decided to connect a 4.5v dc transformer to the two feed wires.

Surprisingly only two of the four colours lit up.

Reversing the polarity lit up the other two colours.

there are only two output wires and connected to the box it was possible to have all colours continuously lit.

Can it be sending tiny bursts of alternating current in DC…… yes I know it makes no sense but I am baffled!!!

⟐ Answer edited December 16, 2023 at 7:30 MST

Thanks.

⟐ Commented December 31, 2022 at 11:32 MST

I've fixed incandescent light strings before... they're a cinch... but this has me baffled! Has anyone here had any success fixing the lights on a tree like this??

Note that this tree only has one plug. Each section passes power through the place where the trunk connects.

I have a LED Christmas light tester... but it's not much help. And frankly... I don't understand why only one color would work.

Thanks!

⟐ Answered November 20, 2022 at 8:30 MST