COBY electronic MP-C643 - Manual (Page 42)

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Ensure that the headphones are attached securely
to the player.
The player will not play my music file.
Ensure that the file is in a compatible format.
The file may be copy-protected and you no longer
have authorization to play this file. If you feel this is
in error, please contact the service from which you
downloaded the file.
The LCD characters are corrupted or something is
wrong with the display.
Ensure that the correct menu language has been set.
Try resetting your player (remove and replace the
battery).
The player has malfunctioned.
Try resetting your player (remove and replace the
battery).
Try updating the player’s firmware. Please refer to
the Firmware Upgrades section of this manual for
detailed instructions.
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TROUBLESHOOTING