Sony GRAND WEGA KDF-42WE655 Operating Instructions Manual page 122

Error message No Memory Stick There is no Memory Stick in the slot.
is displayed Memory Stick is The lock mechanism on the Memory Stick is
Locked engaged.
Memory Stick Error The Memory Stick in the slot might be damaged;
try a different Memory Stick.
Format Error The Memory Stick may have been formatted using
a PC or other device that is not compatible with
cameras.
Error icon is displayed The file is not a valid MPEG1 or JPEG format, or it
is a progressive JPEG (which is not supported).
The thumbnail is not DCF-compatible.
The file is a JPEG or an MPEG1, but the thumbnail
is unreadable.
The file is unreadable.
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