Coby Smart MP201 Instruction Manual page 17

The player will not play my music file.
Ensure that the file is in a compatible format.
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The file may be copy-protected and you no longer have authorization to play this file. If you feel this is
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in error, please contact the service from which you downloaded the file.
The player has malfunctioned.
Try resetting your player (remove and replace the battery).
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Page 17 Troubleshooting & Support