What if only one speaker is working on Dr Dre Beats Solo3 Wireless headset?

Hi ACLCSCCC,

Welcome to Apple Support Communities. We understand you're unable to hear sound from one side of the Beats Solo3 Wireless headphones. We can help point you in the right direction.

Have you tried testing this behavior on more than one device paired to your Beats Solo3? If so and it continues to occur, we recommend to perform a reset, as this may help. Here's an article on how to reset your Beats: Reset your Beats on-ear or over-ear headphones

Please let us know if that helps.

Best regards.