Ah - I've had this problem several times recently on my HP
Eventually traced to Senora A. using it for zoom calls with her friends and plugging in a set of headphones which overrides the normal sound settings and leaves them that way when they're unplugged
As with much of W10 there are two sets of controls - Settings - System-Sound gives you a list of output devices - you may need to set this to your HP speaker
HOWEVER sometimes it doesn't appear there so click on the ^ arrow on the taskbar at the bottom of the screen and then right click on Sound Manager (the speaker icon) and check the settings in Sound- Playback