The speaker may be in protection mode. If the system is disconnected from AC power and unused for 14 days or more, it goes into a protection mode to preserve battery power. Plug your system into AC power to reactivate it
Power troubleshooting
Applies to:
Make sure the cover is open. The speaker will not turn on if the cover is closed.
Try charging the battery on a different AC plug. There may be a problem with the power outlet you're using