Neon Sign Not Working? Work Through This Before You Panic

You're worried about that dark neon sign, but don't be. The good news is that most of the time, it's an easy fix. We've seen it time and time again with warranty inquiries - usually, it takes just a few minutes to get it working again, and you won't even need any tools. Sometimes, you won't have to spend a thing. It's really quite simple. The LED neon is just a chain of a few parts: the socket, the adapter, the dimmer, and the sign itself. When something goes wrong, it's almost always because of one of these links. So, all you have to do is test each one, one by one, and you'll find the problem in no time.

Work through this from the top. Each step rules something out.

Step 1: Prove the socket works

It's really common for people to overlook this, but it's so simple. Plug a lamp or phone charger into the same socket the sign was using. If that doesn't work either, then you know the problem is with the socket itself, so the next step is to check your fuse box to see if a fuse has blown. And if you're using an extension lead, don't forget to test the sign directly in a wall socket - those extension leads can be sneaky and cause problems when they're getting old.

Step 2: Bypass the dimmer

If your sign has a dimmer built into it or a separate control module that you can operate from a distance, try unplugging it and plugging the sign directly into the power adapter. Does the sign turn on now? If it does, you've identified the problem, and it's probably the least expensive part to replace. You can easily get a new dimmer or controller - they don't cost much and are simple to install. While you're troubleshooting, if you find that the sign is responding to the buttons on the dimmer but not to the remote control, it's likely just a dead battery in the remote. And if the sign is stuck on a low brightness setting, double-check that someone hasn't accidentally turned it down - it's an easy mistake to make, and it happens more often than you might think.

Step 3: Suspect the adapter

The power adapter is the part that works the hardest and is most likely to fail in the whole system. So, how do you know if your adapter is failing? Well, there are a few signs to look out for. If the sign is completely dead and you've checked everything else, that's a pretty good indication. Or, if the sign is flickering or pulsing in a regular rhythm, that's another sign. And if the adapter itself is cold and silent, when it used to be slightly warm, that's not a good sign either. If your adapter has a small indicator light, check that too - it might give you a clue about what's going on.

Replacing a faulty part is relatively easy, it's just a matter of swapping it out with a new one. To avoid any issues, make sure the new part matches the voltage and has an amp rating that's equal to or higher than what's printed on the original. Our signs are designed to work with 12V supplies, so using a higher-voltage adapter can cause more problems than it solves. If you have one of our signs, it's best to get in touch with us first so we can confirm the exact specifications before you buy a replacement. This way, you can be sure you're getting the right part and avoiding any potential risks.

Step 4: Check the connections

When the power is off, take a closer look at the cable that runs from the adapter to the sign. Check each connection to make sure it's securely in place. It's not uncommon for signs that get moved around a lot, taken to events, or rearranged during decorating to have loose connections. So, make sure to push the connectors firmly into place. If the sign only lights up when you hold the cable at a certain angle, that's a pretty good indication that there's a problem with the cable or connector. In this case, it's best to stop using it and have it repaired or replaced instead of trying to find a way to balance it in just the right position to make it work.

Flickering: what it means

If your sign is flickering, it's usually a sign of a problem. A rhythmic pulsing that's happening all over the sign probably means there's an issue with the adapter, so you should check that out. On the other hand, if the flicker is random and only happens sometimes, it might be because one of the connections is loose, or maybe the dimmer is worn out. If the sign only flickers when you turn on something else, like the fridge or heater, that's likely because the sign is plugged into the same socket as that thing, and it's using too much power. Try moving the sign to a different socket. But if the flicker is constant and only happening in one small part of the sign, that's a bit more rare, and it probably means there's a fault inside the sign itself. That's when you need to think about the warranty.

One section dim or dark

If an LED sign has a problem, like a single letter or section not shining as bright as the rest, it's usually because of an issue with that specific part of the sign. This doesn't mean you can just fix it from the outside. It's actually a problem with the internal wiring, and that's what warranties are for. So, even if you're tempted to try and fix it yourself, don't open up the sign. The silicone-sealed tube inside is not meant to be messed with, and if you try to do some DIY repair work, you'll probably end up voiding the warranty altogether. It's just not worth the risk.

Water got in

If you have an indoor sign that's been exposed to rain or lives in a room with a lot of steam or condensation, it can stop working suddenly or start flickering. You should unplug it right away and let it dry completely for at least 48 hours in a warm and well-ventilated area before trying to use it again. Sometimes, the sign will work perfectly again after drying out, but other times, corrosion may have already damaged it. Either way, if the sign is going to be in a damp location for a long time, the best solution is to get a sign that's rated for outdoor use and can withstand the elements - we've talked about what signs can handle UK weather conditions in our guide to outdoor signs.

When to stop and claim

If you've gone through the whole process and found that the problem is with the sign, not the parts that can be swapped out, then it's time to get in touch with the people who made it. Don't try to fix it yourself, just contact them. Every sign from Neon Daddy comes with a 3-year warranty, and because we make everything in our own workshop in Wokingham, we can figure out what's wrong and fix it right here. We'd rather hear from you sooner rather than later, even if you didn't buy the sign directly from us - a good maker wants to know if something's gone wrong, so we can make it right.

The two-minute summary

To fix a dark sign, try these simple steps: check the socket, bypass the dimmer switch, take a closer look at the adapter, and reseat the connections. Most of the time, doing these four things will get your sign working again the same day. Usually, when the whole sign isn't working, the problem is with the plug or the cord, and it's not too expensive to fix. But if only part of the sign is out, it's probably a problem with the sign itself, and that's usually covered by the warranty. If you're still not sure what's wrong, it's a good idea to send a picture or a short video of the problem to the manufacturer - they can usually give you a faster and more accurate answer than you'd get from trying to figure it out yourself for an hour.