Most Bluetooth speakers turn themselves off if they get sound input from the computer. If that’s the case with you, make sure to check if it’s turned on before you start playing music or video.

When you connect your system to the 2.4 GHz WiFi band, you may experience issues with the Bluetooth audio devices. Hence, switch your WiFI band to 5 GHz. I hope this helps. How do I fix bad audio ...

Another simple fix is to restart your phone ... Your Android phone may not play any sound through the speaker if it's connected to a Bluetooth device or wired accessories, such as headphones.