My problem is similar to Stevie's. The problem being that I would like to replace the keyboard, but want to buy a cheap non-Vaio one. Is there any way to adjust the brightness without using the "Fn" key of the Vaio keyboard? Normal keyboards don't have that key, I think.
Also, the menu on the side of the screen of the VGC-LV1S does not seem to do much, as Stevie said. I followed your above steps, but nothing seems to have happened - the menu is still very basic and does not contain brightness controls.