Plug soundlink in to wall charger – Hold down the play/pause button for 15 seconds. – Then, BEFORE releasing the play/pause button, unplug the charge cord from the unit. – Release the button, – Plug the unit back into the wall charger. – Press the power button, and your unit should power on.
https://www.amazon.com/Bose-SoundLink-Color-Bluetooth-speaker/dp/B01HETFQKS