Onboard sound disabled in BIOS – Users have reported that installing new drivers disabled the onboard sound device in BIOS and you will have to turn it back on.The problem can be caused by both new or old drivers and you should resolve your problem accordingly. Faulty drivers – It’s possible that driver issues cause the problem when streaming video and sound over HDMI.The default audio output device is changed – Some changes you make to your computers such as installing new Windows or driver updates can change the default audio output device and you will need to change it back.
