• Please make sure that you take the buds out of the case, check if the receiver LED is ON or not
• If the LED is not on, while you Zone True Wireless are out of the case, please plug/unplug your receiver. Then put the earbuds back in the case. Wait for 15 seconds, and open the case
• If the LED is still not ON, please try to plug the receiver to another USB port
• If the LED is still not ON, please do a factory reset

If the LED is still not ON, you may try to repair the receiver in Logi Tune