speaker not working at all

[Flavor]

Here are a couple photos of 2 things to try.  If you can jump these 2 spots with a tweezers or wire, it will bypass the volume potentiometer wheel for the noted channel (left or right as shown in the photo).

Try it using both with headphones and without, please.

If that doesn't "fix" the problem, try "jumping" R9 (which is very close to the headphone jack).  That will bypass the switch inside of the headphone jack that detects whether or not there's a headphone plugged in.  That's a long shot, but if you notice any chance when you jump that, it might give us an idea of what is wrong.

Also, you could just visually inspect the components around this area.  Maybe there is something that isn't fully soldered or something.  In fact, I feel like that's the most probably thing, since it passed our testing before shipping.  If there was something that wasn't fully soldered, it could make contact here and then move slightly in the cold/hot of transportation.