If you are experiencing LG ultrawide monitor no sound, the issue is almost always a simple setting or connection problem. The fix usually involves selecting the correct audio output in Windows or adjusting the volume on the monitor itself.
Does your LG ultrawide monitor have built-in speakers?
Before any troubleshooting, you need to confirm whether your specific model includes speakers. Many LG ultrawide monitors do not have built-in audio hardware. To check, go to the LG website, click the Search (magnifying glass) icon, enter your model name, and press Enter. Select the product image and check the "Specifications" to see if speakers are listed. If your monitor does not have built-in speakers, sound will not play through the monitor, and you will need to connect external speakers or headphones, though you can still get YouTube videos to play on an ultrawide monitor with the right aspect ratio settings. This step saves you from chasing software settings on a monitor that physically cannot produce sound.
Set your LG monitor as the Windows sound output device
Even if your monitor has speakers, Windows may be sending audio to a different device like headphones or a soundbar. To fix this, click the Speaker icon on the bottom right of the Windows taskbar. Check if "[LG Monitor]" is selected as the sound output device. If another device is selected, change it to your LG monitor. Ensure the sound is not muted and is set to an appropriate volume using the slider. This is the most common reason for no audio after connecting a new display.
Adjust volume using the monitor joystick button
Your monitor's physical volume control is often overlooked. Locate the joystick button on the bottom of the monitor. Move the joystick button left or right to adjust the volume and ensure it is not muted. The monitor may show a volume indicator on screen as you adjust it. If the monitor volume is set to zero or muted, no sound will come through even when Windows settings are correct.
Check your signal cable connections
A loose or incompatible cable can block audio entirely. Check the signal cable connections (HDMI, DisplayPort, USB-C). Ensure the signal cable connecting the PC and monitor is securely connected. If the cable appears damaged, try a different cable to see if sound plays. Using an adapter to connect different types of ports may prevent sound from playing properly; a direct cable connection is recommended. Audio may not work due to cable version or compatibility issues between the monitor and the connected device (e.g., PC). For example, some older HDMI cables do not support audio, or a user trying to use an ultrawide monitor with a mac may need a specific USB-C to HDMI adapter that passes audio.
Connect external speakers or headphones
If your monitor lacks built-in speakers or the built-in audio is insufficient, use the monitor's audio output port. Most LG ultrawide monitors include a 3.5mm headphone jack or line-out port. Plug external speakers or headphones directly into this port. Once connected, the monitor will pass audio from your PC through this output. You do not need to change any Windows settings if the monitor is already set as the default device. This works for both stereo speakers and gaming headsets.
Audio settings for LG smart monitors with a remote
If your LG ultrawide monitor is a smart model with a dedicated remote control, use the remote to adjust sound settings. Press the sound setting (sound icon) button on the dedicated remote control. To use the TV speaker, select Settings Menu → Voice → Output Speaker Selection → TV Speaker. To use an external speaker (if applicable to models with an optical digital voice output terminal), select Settings Menu → Voice → Output Speaker Selection → External Speaker (Optical). This menu is separate from the joystick-based volume control and must be set correctly for audio to route to the intended output.
When to contact LG customer support
If the issue persists after these steps, contact LG Customer Support for further assistance. This escalation is necessary when all cable connections are secure, the correct output device is selected, and the monitor volume is turned up, yet no sound is produced. Possible causes at this stage include a hardware defect in the monitor's audio components or a compatibility issue that requires a specific firmware update or cable replacement that only LG can confirm.
