Power
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The operating temperature is below 5 °C (41 ºF).
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Battery life becomes shorter as a result of the battery characteristics. This is not a malfunction.
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Battery charging time is not sufficient.
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Charge the battery until appears.
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By adjusting the settings or managing the power supply properly, it is possible to save the battery power and use your Walkman for a longer time [Details].
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You have not used your Walkman for more than a year.
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Depending on the conditions under which the Walkman is used, the battery may have been deteriorated. Consult your nearest Sony dealer.
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The efficiency of the battery will improve by repeatedly charging and discharging it.
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When usable battery life becomes half the usual time, even after charging the battery fully, the battery should be replaced.
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Consult your nearest Sony dealer.
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The USB cable is not connected to a USB connector on your computer properly.
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Disconnect the USB cable, and then reconnect it.
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Use the supplied USB cable.
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The battery is charged in an ambient temperature out of the range of 5 °C (41 ºF) to 35 °C (95 ºF).
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You cannot charge the battery when icon appears. Charge the battery in an ambient temperature of 5 °C (41 ºF) to 35 °C (95 ºF).
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The computer is not on.
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Turn on the computer.
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Your computer has entered Sleep or Hibernation status.
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Release the computer from Sleep or Hibernation status.
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A USB hub is being used.
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Connecting your Walkman via a USB hub may not work. Connect the Walkman directly to your computer using the USB cable (supplied).
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The operating system installed on the computer is not supported by your Walkman.
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To charge the Walkman, connect it to a computer with the operating system that is supported by the Walkman [Details].
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You have not used your Walkman for more than a year.
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Depending on the conditions under which the Walkman is used, the battery may have been deteriorated. Consult your nearest Sony dealer.
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After prescribing the remedies above, if the problem still persists, press the RESET button of your Walkman [Details] and reconnect it to the computer by using the USB cable (supplied).
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To avoid unnecessary battery consumption, your Walkman automatically turns off.
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Press and hold the OPTION/PWR/HOLD button to turn the Walkman on.
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If the battery is already almost fully charged when charging begins, little time is needed to reach full charge.