I am sorry to hear that your headphones will not turn on. Could you please try the following steps and let me know how you get on?
1. Go to btu.bose.com on a computer and update your headphones software.
2. Perform a product reset, to do this, turn off the headset and wait 30 seconds and then plug the headset into a wall outlet using a USB charger, then wait 5 seconds. After that unplug the USB cord from the headset and wait 1 minute once you have completed this turn the headset back on.
I look forward to hearing from you!
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