I have a Sony KDL-40S4100 and the Xbox 360 Slim. The kind that did not come with a HDD, just the 4 GB internal memory and I added in the 250 GB HDD. When I use an HDMI cable, it used to work fine, but now it does not want to send an audio or video signal. My TV is set to only let me select inputs if there is a signal there. When I select the input that my 360 is plugged into, I change to the input, but there is no audio or video. I've tried all 4 HDMI ports on the TV with the same problem. My laptop connects just fine to the TV with the same cable. The component cables work just fine, 1080i displays fine on the TV. This leads me to believe that there is a handshake issue. I've tried turning everything off and back on, having the TV on, then turning the 360 on then plugging the HDMI cable back into the 360 to no avail. Had both devices on, unplugging and plugging the HDMI cable back in to the TV to, but to no avail. Anyone have any ideas on what I could do to resolve this issue aside from just using the component cables?