Thanks for reaching out to us and we appreciate the update. Sorry, you're having issues with your SL2. Just to clarify, neither of the LEDs light up when plugged in? This would indicate no power.
Can you try to reseat the power cord and try different outlets?
Let us know when you get the chance.
Mohsin - Community Support
Thanks for the update!
Can we try and connect the headset to a computer with a USB cable and navigate to btu.bose.com? I'd like to see if the headset gets registered by the updater and if there is an update available as well. If this doesn't resolve the issue, I'd recommend reaching out to your local support team for service. Just click HERE and select your country and Contact Us at the bottom of the page.