I seem to have now fixed this.
I logged out, and at the login screen, I noticed that at the top right
there was a sound icon. I clicked on it and it showed the sound as
muted. So I unmuted and then logged in.
I had not see this before because the login screen is basically dark
purple with black text, with only the login box really standing out.
I tried to change the login background but so far failed to get it to
see a new image.
David K
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