Nintendo Switch Can't Change Volume

When tapping the volume up/down buttons, I see the volume bar appear, but it does not go up or down and is stuck where the volume is. When docked, volume works fine through the tv.

I took it apart and pulled out the actual buttons and found nothing going on that I could see visually. When I put it back together, no change. I did a reset, which DID change the volume level (it was about 1/3 volume before reset, now it’s stuck at 2/3 volume) but still getting same issue.

This issue appeared after the unit dropped to the floor.

I am still very new to electronics repair. What else should I look for? Connection to main board is solid.