There is noise, skipping, or distorted sound.
•Turn off the system, then connect the USB device again.
•The music data itself contains noise, or the sound is distorted. Noise may have entered during the transferring process. Delete the file, and try transferring again.
The USB device cannot be connected
into the 
(USB) port.
•The USB device is being connected backwards. Connect the USB device in the correct orientation.
“USB Reading” is displayed for an extended time, or it takes a long time before playback starts.
•The reading process can take a long time in the following cases.
–There are many folders or files on the USB device.
–The file structure is extremely complex.
–The memory capacity is excessive.
–The internal memory is fragmented. Thus, we recommend following these guidelines.
–Total folders on USB device: 100 or less
–Total files per folder: 100 or less
Erroneous display.
•The data stored in the USB device may have been corrupted, perform the transferring again.
•The character code that can be displayed by this system are as follows:
–Upper cases (A to Z)
–Lower cases (a to z)
–Numbers (0 to 9)
–Symbols (< > * +, ? / [ ] \ _)
Other characters may not be displayed correctly.
The USB device is not recognized.
•Turn off the system, then reconnect the USB device.
•Connect the supported USB device (page 56).
The USB device does not work properly. Refer to the USB device operating instructions for how to deal with this problem. If the problem persists, contact your nearest Sony dealer.
Playback does not start.
•Turn off the system, then connect the USB device again.
•Connect the supported USB device (page 56).
•Press NX (or N on the remote) to start playback.
Playback does not start from the first track.
•Set the play mode to Normal Play (page 28).
The audio files cannot be played back.
•MP3 files in MP3 PRO format cannot be played back.
•Some AAC files may not be played back correctly.
•WMA files in Windows Media Audio Lossless and Professional format cannot be played back.
•The data is not stored in MP3/WMA/ AAC format.
•USB device formatted with file systems other than FAT16, or FAT32 (cluster size 512 byte – 32 kbyte) are unsupported.*
•If you use partitioned USB device, only audio files on the first partition can be played back.
•Playback is possible up to 8 folder levels.
•The number of folders has exceeded 997.
•The number of audio files has exceeded 999.
•Files that are encrypted or protected by passwords, etc. cannot be played back.