I have KDL-52W4100 and it is connected to my PC via HDMI output, running of ATI 4550 card. In the past, I recall that the option was grayed out, probably because I was using VGA or DVI, I am not sure when it was grayed out, but it was. I am now trying to enable it since it is not grayed out, and it doesn't seem to work anymore. I try low and high setting, there is no difference. I miss the soap opera effect, especially when watching music videos or cartoons. Anyway, if anyone has any ideas, please share.
I checked the software version, it starts with HO, according to sony, update is not needed.
Yamaha RX-A550, 17 year old Sony speakers
Roku, Fire TV, Viewsat Receiver, Time Warner NYC, Harmony 700