In Windows Settings | Sound | Output | Choose your output device | click the drop-down list. Do you see the onboard speakers listed? If so, select that option.

Thanks for your prompt reply. It's currently set to Realtek(R) Audio, which I believe are the onboard speakers.

Does anyone else have any suggestions?

Thanks

You should attempt to test output out of all of the output devices and see if you hear anything (this can be done by right clicking on the relevant output device). Also attach a screenshot of the output devices on your system that can be seen through the sound settings. (You will find all of this under Sound settings where you scroll down and select "More sound settings" and under the "Playback" tab)

The sound is fine when output via the headset, but there's no sound when the headset is removed and the output defaults back to Realtek. Attached are a couple of screenshots, taken when the headset was connected.

Many thanks

PS - under Properties for Realtek(R) Audio it states 'This device is working properly'

Sadly I cannot see your screenshots. I don't know if moderators need to approve them first

Ah. They are png images - it doesn't appear to allow me to upload jpgs

I am having the exact same issue. Not sure exactly when it started but had to be in the last week or so. I get audio through bluetooth headset but nothing through the speakers.