Optical discs – Sony VAIO VPCY21 SERIES User Manual
Page 138
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Troubleshooting >
Optical Discs
Optical Discs
What should I do if my external optical disc drive does not work properly?
Make sure that your external optical disc drive is connected to an AC power source and the USB port on your computer. If it
is not connected, the external optical disc drive may not work properly.
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