Why? = I was told that there may be a bios update that would correct a problem with my USB ports not all working with all peripherals. Sony site = Yes, as I said, I tried looking up my model on the official Sony site for my country and it was not listed nor would it take my number typed, nor would it automatically read it. I am curious how the model you suggest (PCG-GRV550) is like the 8F1L. I am saying that I don't know what the letters and numbers mean exactly, although Sony must have had some methodology in their model numbering scheme.