How to Fix Led Lights When They Won’t Turn on

Do you have a string of LED lights that won’t light up? This can be incredibly frustrating, especially since they are often used to decorate, add ambiance and bring life to any setting.

Led lights are a great way to add ambiance, lighting, and decorations to your home or office. Whether you use them to light up the hallway, or back patio, or as accent lights in the living room, led lights can bring that extra spark of beauty and style that everyone loves. If your LED lights don’t turn on, the problem may lie within one or more of the components in its design – like bulbs, wires or the transformer. 

How to Fix Led Lights When They Won't Turn on

In this post, we’ll be exploring how to fix led lights when they won’t turn on so that you’re sure always to have a bright spot in your home.

What are the Causes of LED Lights Not Working?

There are a few reasons that your led lights may not be working. The most common causes are:

1. Loose Connections: If the connections between each lightbulb and the transformer, wires, or plug become loose or disconnected, the lights won’t turn on. Check all connections to ensure that they are tight and secure.

2. Fuse Failure: Many LED lights have a built-in fuse that can become damaged or blown over time. Check the fuse to make sure it is still working and replace it if necessary.

3. Transformer Problems: The transformer changes the current from AC (alternating current) to DC (direct current). If this isn’t properly functioning, your lights won’t turn on as expected. This can be checked by swapping out the old transformer with a new one or testing it with a voltage tester or meter which will tell you if there’s an issue with the transformer itself.

4. Bulb Issues: It could also be an issue with the bulbs themselves, either because of wear and tear, incorrect installation, or because the bulbs were simply faulty. Replace any damaged bulbs to see if this resolves your issue.

Replace Any Damaged Bulbs

What Will You Need?

To fix your led lights when they won’t turn on, you’ll need the following items:

  • Voltage tester and meter
  • Replacement LED bulbs
  • Phillips head screwdriver

Once you have your materials, follow these steps.

10 Easy Steps on How to Fix Led Lights When They Won’t Turn on

1. Check Connections:

Start by checking all the connections between each bulb, wire, or plug to ensure they are tightly secured and not loose. If any of them appear to be damaged or disconnected, try replacing them with new ones. Also, check the fuse and transformer for any damage or issues. 

2. Replace Bulbs:

If it appears that all the wiring is intact and secure, replace any burnt out bulbs with new ones if necessary. This could be the source of the problem. If this doesn’t work, move on to the next step.

3. Test Transformer:

If you suspect that the issue may lie within the transformer, use a voltage tester or meter to check it for proper functioning. If it is not working correctly, replace it with a new one and try again. It will usually require a Phillips head screwdriver to remove the old transformer.

4. Check All Switches:

Check all switches, including light switch covers, dimmers, etc., making sure that they are in the correct positions and functioning properly. This could be the source of your problem. You can also check the bulbs themselves to make sure that they are correctly installed.

5. Replace Fuse:

If your LED lights have a fuse built into them, check it to see if it’s damaged or blown and replace it as needed to ensure that everything is connected securely and operating correctly. Another option is to replace the entire lighting unit with a new one, although this may not be the most cost effective solution. Try the other steps first.

6. Check Distance:

Ensure that the LED lights are not too far from the transformer, wires, or plug, as this can cause them to malfunction. It is important to keep them as close as possible to these sources of power. If necessary, shorten the distance between them to get it working again.

Keep Them as Close as Possible

7. Read the Manufacturer’s Instructions:

If you are having trouble with your LED lights, refer to the manufacturer’s instructions closely for any troubleshooting tips. There may be something that you have overlooked or not considered. As always, if in doubt, reach out to a professional for assistance.

8. Check Circuit Breaker Box:

Check your circuit breaker box to make sure that all of the switches are set correctly, and that there isn’t a tripped switch causing the issue with the lights.  Additionally, make sure that there is not an overloaded circuit that could be causing the issue. Don’t forget to reset the circuit breaker if necessary.

9. Power Cycle The Lights:

Turn off all power leading into and out of your light fixtures, then unplug them completely before turning them back on again after a few minutes. This will help to reset the system and may resolve any issues. Moreover, unplug any devices or appliances that may be interfering with the power supply.

10. Call a Professional:

If you still can’t figure out what is wrong with your LED lights, it’s best to call a professional electrician who can help diagnose and fix the issue. They will be able to quickly identify the source of the problem and take care of it. Remember always to stay safe when working with electricity.

Following these steps should help you troubleshoot and repair any problems with your LED lights when they won’t turn on. With some patience, knowledge, and the right tools, you’ll be able to get them working again in no time!

5 Additional Tips and Tricks

1. Make sure the circuit breaker is on. It’s possible that a power trip has caused your LED lights not to turn on. Check your main electrical panel and ensure all switches are in the “on” position before attempting any other fixes.

2. Check if the light bulbs are screwed in correctly. Over time, LED light bulbs can become loose and require re-tightening or replacing. If you have multiple lights, check each bulb individually until you locate the issue.

Light Bulbs Are Screwed in Correctly

3. Inspect the wiring connections for damage or wear and tear. It is important to look for signs of a short-circuit, like discoloration or molten plastic around wire ends, as this could be causing your LED lights not to work properly.

4. Replace the dimmer switch if necessary. Depending on the age and model of your LED lights, you may need to replace the dimmer switch to resolve any issues with flickering or no power.

5. Look for signs of corrosion around battery terminals or light fixtures. Corrosion can build up over time, preventing current from flowing through your LED lightbulbs correctly. Cleaning any corrosion from battery terminals or light fixtures is a simple but effective fix that should get your lights working again in no time!

With these five tips and tricks, you should be able to get your LED lights up and running again in no time. If all else fails, don’t hesitate to contact a qualified electrician for further assistance. Remember, safety should always be your top priority when attempting any electrical repairs or maintenance.

6 Things You Should Avoid

  1. Avoid overloading circuits with too many light fixtures or bulbs.
  2. Never attempt to repair any electrical components if you don’t have the right tools or knowledge.
  3. Never use an extension cord to supply power to your LED lights.
  4. Don’t leave exposed wiring connections uncovered and unprotected.
  5. Avoid using high-voltage solutions, such as voltage boosters, when installing your LED lights, as this could lead to malfunction or even fire hazards.
  6. Don’t try to power your LED lights with a generator, as this could cause an electrical overload and damage the lighting system.
Power Your LED Lights With a Generator

Remember that safety should always be a priority whenever you are dealing with electricity or attempting any repairs or installations yourself!


In conclusion, fixing LED lights when they won’t turn on may seem a bit daunting. However, if you take the correct steps to troubleshoot and get to the root of the issue, even a novice DIYer can get their light up and running in no time. This can save you an expensive service call or a costly replacement of a bulb.

With the right attitude and some basic understanding of how electrical circuits work, you should be able to identify each potential cause and narrow down your options until you successfully fix your LED light’s issue.

Additionally, when all else fails, it’s best to consult with a licensed electrician with the knowledge and experience to solve almost any electricity-related problem. Don’t forget testing is key; never give up!

Hopefully, the article on how to fix led lights when they won’t turn on has been useful, and you are now well on your way to getting your lighting system back up and running. Good luck!

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