Troubleshooting : The headphones do not turn on

Check the battery level. You can either check it in the Marshall Bluetooth app, via the battery icon in iOS, or in Google Fast Pair for Android devices.

Connect your headphones to a USB-C power source. Check if the LED indicator on the headphones turns on (it could be red, orange, or green). If not, try using a different USB-C cable, adapter, or power outlet.

If the issue persists, perform a factory reset. This will return the headphones to their original settings, excluding any firmware updates.