Sony kdl-40s2000 I just purchased a sony kdl-40s2000. I have it connected to a Motorola DVR providied by Comcast. It is connected via a HDMI port. The problem is when I change channels on the cable box/DVR, the TV will go blank. It doesn't turn off, but there is no picture until I turn it off and turn it back on. This happens about 30% of the time. Any thoughts?

I have had an extremely similar problem with my Comcast Motorola DVR and Sony Bravia with HDMI connection. For months I would lose picture/keep sound when changing from a non-HD to an HD channel. The solution that I found is that there is a setting in the cable box setup that will likely fix your issue. Turn off your cable box leaving the TV on. Quickly press the Menu button on your remote to get into the Box setup. Make sure that 4:3 Override is set to "Off" instead of 480i. I believe this will solve your problem.

Probably need a software upgrade. Contact Sony for that information. This would be a common fix in most sistuations when using HDMI.