Thanks, Allan. Control Panel for Sound gives 3 boxes: 1)Playback, 2)Recording, and 3)Sounds.
2) shows mike and aux in are working,and line-in not plugged in
3) looks like sound effects for specified events. Relevant here?
1) says: Speakers-Realtek High Definition Audio Not Plugged In, and
: Realtek Digital Output-Realtek High Definition Audio is working
As I mentioned before, the speakers are plugged in and produce sound if you test the speakers.