I upgraded my Sony VGN-FW170J laptop from Vista to W7. After the upgrade, there is no audio via HDMI cable to my TV (worked with Vista). I have discussed this with Sony and they indicate that I need an updated driver from Intel.
There is an Intel High Definition Audio HDMI driver on the system with a date of 6/30/2008 and a version of 220.127.116.110.
I am using W7 Home Premium 64 bit.