What makes you happy ?

I still have only the tiniest sound from one speaker even if the other is booming.
Every driver (nvidia, realtek) is up to date. I have uninstalled and reinstalled more than once.
Machine is clean, everything well seated.
Sound settings correct.
Headphones direct into the socket in the dead speaker work properly.
The speakers work perfectly when plugged into my zen.
I have tried everything I have found.
But I have no clue as to where sound is actually driven - motherboard or gfx card?
So what do I look to replace?

Update:
It’s hardware. Somewhere between the wiring from the headphone jack inside the speaker to the actual noise-making parts it is damaged. How on earth that happened I have not the slightest clue - I’ve never had a speaker just break before. So it’s off to a box-shop tomorrow to get some new ones. Neverwinter just isn’t good in mono through the one.
And I’m annoyed that I didn’t take it all apart and test with known good parts earlier. I’m meant to be able to troubleshoot stuff ;)