You cannot charge your Walkman.
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Charge the battery within the ambient temperature range of 5 °C to 35 °C (41 ºF to 95 ºF).
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You need to turn the computer power on in order to charge your Walkman. Check whether the computer is in standby (sleep) or hibernation status.
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Check that the USB connection to the computer is made properly.
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There may be bad electrical contact in the connector. Disconnect your Walkman, and then reconnect it.
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Use the supplied USB cable.
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Your Walkman may not be able to connect properly to your computer when using a USB hub. Connect the Walkman directly to a USB connector on your computer.
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Check whether the operating system and operating system version installed on the computer are compatible with your Walkman.
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The battery may have deteriorated if you have not used your Walkman for more than a year. Contact your nearest Sony dealer.
- If the remedies above do not solve the problem, press and hold the button for about 10 seconds to restart your Walkman, and then connect again using USB.