Is your advertising display suddenly playing no sound, or producing loud static, distorted, or intermittent audio? Before rushing to request a repair, many minor issues can be resolved with some simple checks. Follow the steps below to systematically identify the cause.
First, Don’t Panic—Start with These Quick Checks
Most sound issues stem from basic settings and can be checked in just a few minutes.
Is It Muted?
This is the most common reason. Check whether the "Mute" button on the remote control or the device body has been pressed, or if the volume has been turned all the way down.Does the File Itself Have Audio?
Is the ad video you’re playing actually meant to have sound? Try playing it on a computer or phone first to confirm. Sometimes, the file itself may have very low volume, making it seem silent.Are All Cables Connected Properly?
If your advertising display is connected to external speakers or an amplifier, check if the audio cable (usually a black cable) is loose or plugged into the wrong port. Try unplugging and firmly reconnecting it.
If the Above Steps Don’t Work, Check System Settings
If basic checks show no issues, it’s time to look into the advertising display’s internal settings.
Find the Sound Settings Menu:
Use the remote to navigate to "System Settings" or "Audio Settings."Check the Audio Output Channel:
This is a key setting. Look for "Audio Output" or "Sound Output."If your display is connected via HDMI but the output is set to "AUDIO OUT," you won’t hear sound.
Conversely, if you’re using external speakers but the output is set to "HDMI," the speakers won’t work.
Try switching this option based on your actual connection setup.
Restart the Device:
Just like rebooting a phone when it lags, power off the advertising display completely, unplug it for a minute, then plug it back in and turn it on. Sometimes, minor system glitches cause audio issues, and a restart can fix them.
Still No Luck? It Might Be a Hardware Issue
If software and settings checks don’t resolve the problem, the issue could be hardware-related.
Use the “Replacement Method” to Isolate the Problem:
Test the Advertising Display Itself:
Unplug all external speakers and USB drives, and test the sound using only the display’s built-in speakers.Test External Speakers:
Plug a working pair of headphones into the headphone jack of the advertising display.If you hear sound through the headphones, the external speakers may be faulty.
If there’s no sound through the headphones either, the problem likely lies within the advertising display.
Try Different Ports:
If the display has multiple audio ports, test another one.
Common Hardware Issues:
Faulty Speakers:
The built-in speakers of the advertising display may wear out or become damaged over time, causing no sound or distorted audio.Internal Component Failure:
Issues with the audio processing chip or circuitry inside the device usually require professional repair.
When to Seek Professional Help?
If you’ve tried all the methods above and the problem still persists, it is likely due to hardware failure. Do not attempt to disassemble the device yourself at this point, as it may cause further damage.
Before contacting our customer service, please prepare the following information:
The specific model of your advertising display (usually indicated on the label at the back of the device).
A detailed description of the issue (e.g., "No sound from built-in speakers, but sound is audible when headphones are plugged in").
The troubleshooting steps you’ve already attempted, so our technicians can diagnose the problem more efficiently.
"This article is part of the 'Advertising Machine FAQ' series. If you are experiencing other issues, such as unresponsive touch screens, black screens, etc., feel free to visit our [Advertising Machine Common Problems and Solutions (FAQ) Center | Ultimate Troubleshooting and Maintenance Guide] for quick answers."