Windows 10: Red x on speaker - tried everything but no sound

I have an Acer Nitro 5 laptop with Windows 10. I have done everything. I have used the trouble shooter. I have uninstalled all drivers and devices. I am unable to uninstall past updates. I have contacted Acer and they can't help any more. Only thing I haven't done is reformat the computer. I got this comp in August and the speakers stopped working after 2 weeks. I used to be able to connect to bluetooth speakers and the sound would work. Now that doesn't even work. How do I fix this?

:)

 

no sound plays through internal speakers

I cannot get any sound to play through the internal speakers of my laptop. It did play previously. The speaker in the task bar has a red and white x and the trouble shooter says no speakers headphones plugged in. When I pull up the info on sound it lists
its location at HDMI port. Suggestions?

 

Red X gone but still no sound coming out of speakers after Windows update

after being forced to update to windows 10 my speaker icon for volume showed a red X, so I followed recommendations and the red X is NO longer there, but I still have no sound coming from the speakers, I've done everything and keep getting FAILURE TO PLAYBACK
TEST TONE, please help

 

red X by audio after 1709 update - audio device gone in device manager.

Just updated to 1709, and got a red X by the speaker symbol. All instructions say "manually update the driver, or, de-install / re-install, or perform an automatic update... there's nothing to de-install / re-install and update. I was going to manually update
the inf driver, but there is no audio or sound speaker symbols listed in my device manager - gone!

Any suggestions?

Thanks

Lars