USB trouble
The unit does not detect the USB flash drive
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The USB flash drive is not connected to the USB jack securely.
Turn off the unit, reconnect your USB flash drive, and turn the unit on again.
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The file system of the USB flash drive is not FAT16 or FAT32.
Use a USB flash drive with FAT16 or FAT32 format.
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TROUBLESHOOTING > When any problem appears