Thanks for reaching out and welcome to the Bose Community Forums.
I am sorry to hear that you're having some trouble with the sound on the left-hand side of your Frames, but I am sure that we can get it sorted!
To start with let's try the following steps to see if we can resolve this issue with troubleshooting:
I look forward to hearing how you get on with these steps.
Vicky W - Community Support
My Frames are connected properly and I've used them before but today the left side stopped working. I even checked it on multiple devices such as other phones and computers.
Thanks for getting back to me so quickly.
As you have tried all troubleshooting steps, the best option here would be to reach out to your local customer support center and explore the service options for your Frames. You can do this by clicking this link here, selecting your region, scrolling to the bottom of the page, and selecting contact us. If you are in the US or UK you can also reach out via Facebook or Twitter and one of our team can help you there.
I am confident a member of the team will be able to assist you.