Few things are more frustrating than settling down to watch your favorite show or movie only to discover there’s no sound. ONN devices are generally reliable, but like any technology, they can sometimes run into audio problems.
The good news is that most of these issues are easy to fix with a few simple checks. Let’s walk through the common causes of ONN audio problems and how you can resolve them step by step.
Common Reasons for ONN Audio Issues

Here are the common reasons why you can experience audio issues on an ONN device.
- Device-Specific Problem – If other devices (like a gaming console or Blu-ray player) work fine with your TV or monitor, the issue is likely with the ONN device itself.
- Loose or Faulty Connections – HDMI cables, USB ports, or power adapters may not be properly connected.
- Insufficient power supply (especially when powered via a TV USB port instead of a wall adapter) can cause audio glitches.
- Muted or Low Volume Settings – The TV, monitor, or casting device (phone, tablet, laptop) may be muted or set to very low volume.
- ONN Voice Remote or Google Home app settings may also reduce or mute sound.
- App or Channel-Specific Glitches – Sometimes, audio issues occur only on a particular app or channel due to temporary bugs.
- Outdated Firmware – Running older system software can cause compatibility or performance issues.
What To Do To Fix ONN Audio Issues
Follow this step by step guide when you experience audio issues on an ONN device.
1. Confirm the Issue Is ONN-Specific
To rule out problems with your TV or monitor, connect other devices like a gaming console or Blu-ray player to the same screen.
If those devices produce sound normally but your ONN device doesn’t, the issue likely lies with the ONN device itself—not your display.you can fix cast issues on ONN following this guide.
2. Inspect HDMI, USB Ports & Power Supply

Make sure your ONN device is properly connected and receiving enough power:
Try unplugging the ONN and reconnecting it to a different HDMI port on your TV or monitor.
If the ONN is powered via the TV’s USB port, switch to a wall outlet using a USB power adapter—or vice versa.
This helps ensure the ONN device gets consistent, full power for optimal performance.
3. Check If The ONN Device is Muted

When you are having audio issues, make sure the TV or monitor’s volume is not muted and that the volume level is not too low.
Ensure the device phone, tablet, laptop you’re using to cast is also not muted.
If you’re using a ONN Voice Remote, you can check the volume settings directly using the remote.
You can also restart the ONN device once and check if that helps.
You can also use the Google Home app to check the volume level. To do that, open the Google Home app on your phone or tablet.
Tap on your ONN device from the list.
Make sure the volume slider is turned up. You can adjust the slider as per your need.
4. Check The Sound Quality on Other Apps

If you’re experiencing audio sync issues or sound issues on a particular channel or app on your ONN, you can check the sound quality on other channels or apps to determine if the issue is isolated to that specific source.
Sometimes, the problem may be due to a temporary glitch, with that particular channel or app.
If other channels or apps are working fine and have no sound issues, the problem is likely with the initial source, and you may need to wait for it to resolve or try troubleshooting steps specific to that channel or app.
5. Update Your ONN Firmware
The next thing you can do is check if your ONN is running the latest firmware settings. For that, navigate to Settings from the Home Screen. Select All Settings.
- Scroll Down and select System.
- Then select About and select System Update.
- If there is any update available download and install the update.

Once the update is installed you can restart your device and check if the issue is solved.
6. Factory Reset ONN
If the methods shown did not help, factory reset the ONN device, reset Chromecast via Settings, from the Home Screen navigate to Settings. Then select All Settings.
Next, head to System. Then select About.
Next, select the Factory Reset option. Confirm your action when asked. Follow as shown to finish the process.

7. Contact ONN Support
If none of the steps work and you still have no sound, visit the https://support.google.com/chromecast/chromecast?hl=enOnn Support.
Check if your device is still under warranty and request a replacement.
Wrapping Up
ONN audio issues can stem from something as simple as a muted volume setting or as complex as a hardware defect. By methodically checking connections, adjusting settings, updating firmware, and testing across apps, most problems can be solved quickly at home.
If all else fails, a factory reset or reaching out to ONN Support ensures you won’t be left without sound for long. With these steps, you’ll be back to enjoying crisp, clear audio in no time.