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
Speaker will not turn on
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
Perform a product reset. To perform a SoundLink® speaker reset, following these steps:
on the speaker, press and hold mute for 10 seconds; the leds will flash briefly
press power to turn the soundlink® speaker back on