A portable monitor is a great way to expand your screen real estate, whether you are working from a coffee shop, presenting to a client, or gaming on the go. But when you plug everything in and the picture looks perfect while the sound stays completely silent, it can be frustrating. If your portable monitor speaker is not working, you are not alone — this is a common issue that usually has a simple fix.
Before diving into settings and drivers, confirm that your portable monitor includes built-in speakers. Not all portable monitors come with speakers. Some models rely entirely on the source device for audio output, while others feature a 3.5mm headphone jack for external speakers or headphones. Check your monitor's product specifications or user manual to verify whether it supports audio playback.
For example, SSA Digital's range of portable monitors — including the 10.5-inch P105, 15.6-inch P17 and P18, and the 24.5-inch 4K P19 — are designed with built-in speakers and multiple connectivity options to suit different setups. If you are sourcing from a portable monitor manufacturer, confirming the audio specifications before purchase can save you troubleshooting time later.
Portable monitors connect to devices through different cable types, and each handles audio differently:
One of the most common reasons a portable monitor speaker stops working is that the computer or phone is sending audio to the wrong output device. When you connect a portable monitor, your system may continue playing sound through its own built-in speakers rather than switching to the monitor.
On Windows, right-click the speaker icon in the taskbar, ｓｅｌｅｃｔ "Open Sound settings," and under "Output," choose your portable monitor from the dropdown list. If the monitor does not appear, click "Manage sound devices" and look under "Output devices" to see if it is listed but disabled. If it is disabled, ｓｅｌｅｃｔ it and click "Enable."
On macOS, go to System Settings > Sound > Output, and ｓｅｌｅｃｔ your portable monitor from the list of available devices. If it does not appear, disconnect and reconnect the cable, or try restarting your Mac.
On Android phones and tablets, audio routing over USB-C can vary by device. Some phones automatically route audio to the external display, while others require you to manually switch the output. Check your phone's sound or media output settings after connecting the monitor.
It sounds obvious, but double-check that the volume is not muted or turned all the way down — both on the portable monitor itself and on the source device. Many portable monitors have physical buttons or an on-screen display menu for adjusting volume. Look for a volume rocker, a settings wheel, or a touch-sensitive control panel on the monitor's edge. Also check that the source device's volume is turned up and that no app-specific mute is active.
If you have checked all the settings and connections and the portable monitor speaker is still not working, outdated or corrupted audio drivers may be the cause. On Windows, open Device Manager, expand "Sound, video and game controllers," right-click your audio device, and ｓｅｌｅｃｔ "ｕｐｄａｔｅ driver." Choose "Search automatically for drivers" and let Windows find the latest version. If updating does not work, try uninstalling the driver and restarting your computer — Windows will reinstall it automatically.
For Mac users, audio drivers are built into macOS and are updated with system updates. Go to System Settings > General > Software ｕｐｄａｔｅ and install any available updates.
A simple restart can resolve many audio issues. Turn off both the portable monitor and the source device, wait a few seconds, then turn them back on. Reconnect the cable and check if the audio is working. This refreshes the handshake between the two devices and can clear temporary glitches that prevent audio from being recognized.
If you have tried all the steps above and the speaker still does not work, the issue may be hardware-related. A faulty speaker, a damaged audio circuit, or a defective port can all cause audio failure. If your monitor is under warranty, reach out to your portable monitor supplier for a replacement or repair. A reliable portable monitor manufacturer will offer after-sales support and quality assurance to help you resolve hardware issues quickly.
To minimize the chance of running into speaker problems again, keep your system and drivers updated, use high-quality cables that support both video and audio, and set your portable monitor as the default audio output device in your system settings. When buying a portable monitor, look for models with clearly documented audio specifications and consider working with a portable monitor manufacturer that provides detailed product support and warranty coverage.
