Looking for experienced electronics engineers to help solve a common Bose QuietComfort Earbuds II hardware failure
Hello everyone,
I'm looking for experienced electronics engineers, repair technicians, or anyone with advanced knowledge of PCB-level electronics.
I'm investigating a very common hardware failure affecting the Bose QuietComfort Earbuds II. Many users report that one earbud suddenly stops working, won't power on, won't charge, or can no longer connect, even after trying all the official troubleshooting steps.
I've already repaired many consumer electronics, but I'd like to collaborate with people from around the world to identify the actual root cause of this failure.
I'm interested in discussing topics such as:
- Common component failures.
- Charging circuit diagnostics.
- Battery management ICs.
- Power rails and voltage measurements.
- Possible firmware corruption.
- Typical failed components on the PCB.
- Reverse engineering the board.
- Successful repair techniques beyond simple battery replacement.
If you've successfully repaired this model—or have board-level repair experience—I would really appreciate your insights.
My goal is to identify a reliable repair method that can help technicians and owners worldwide instead of having these earbuds end up as electronic waste.
Thank you in advance. I look forward to hearing your ideas and experiences.