Lost left speaker channel
My mid-2011 Macbook Air 13" lost the ability to charge the battery. I replaced the IO board with replacement from iFixit (IF188-069).
The power is now working perfectly, but the left speaker (the one plugged directly into the IO board) does not make any sound. I've tested the new headphone jack and both left and right channels work fine.
I opened the case back up and disconnected and reseated the speaker connection, but I'm still getting no audio on that channel. I don't see any damage to the wires or connector. Any ideas for next steps in troubleshooting or repair? If the board were defective, I suspect there would be more wrong with it...
Thanks in advance!
Is this a good question?