Sony MDR-ZX770BT Help Manual page 97

Help Guide
Troubleshooting
Wireless Stereo Headset
MDR-ZX770BT
Charging cannot be done.
Check that you are using the micro-USB cable supplied.
Check that the micro-USB cable is connected to the headset and the computer firmly.
Check that the computer is turned on.
Check that the computer is not in standby, sleep or hibernation mode.
When using Windows 8.1 update using Windows Update.
Related Topic
Charging the headset
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