| Issue | Solution | |-------|----------| | PC doesn’t detect speaker | Try different USB port, cable, reinstall CH340 driver. | | Update tool stuck at 0% | Re-enter update mode (steps 2.1–2.5). | | Speaker won’t turn on after update | Hold Power 10 sec, then charge for 10 min, then try again. | | No sound after update | Factory reset + forget device on phone + re-pair. | | Can’t find COM port | In Device Manager, update driver manually for “Unknown device”. |
A can breathe new life into your speaker, fixing sound balance issues and improving overall audio quality. While the process requires a PC and a few technical steps, the result is a better-sounding, more reliable device. w-king d9-1 firmware update