How to Disassemble the Bose QuietComfort (QC) Ultra Headphones to Fix No Sound or No Charge Issues (DIY Teardown and Repair Guide)
Do your Bose QuietComfort (QC) Ultra wireless Bluetooth headphones have a dead or failing battery? Does the charging port only work when the cable is held at a specific angle? Are the earpads or headband cracked, torn, peeling, or degrading? Does the device produce no sound, constant static, or a white hiss noise in one earcup? Does it have a floppy or broken swivel hinge? If you're experiencing any of these issues, it’s time to replace the failing components.