See if you can hit the "info" button to bring up the resolution of the TV for the commercials. I wonder if they are in different aspect ratios (unlikely) or if the TV is just loosing track of the ratio/resolution.
What is the picture source and is it going through any other appliances (AV amp system for example)
Our HDTV, Model LN46A550, cable provided, blinks on & off during certain commercials. (usually the same commercials) The screen blinks black, shows the commercial, blinks black, etc. More often than not, the following commercial will do the same. Commercials only. Can someone explain why this happens & if there is a solution to the problem?