I have the same problem. It runs fine, everything seems normal. Then all of the sudden, it goes blank. Audio still plays, but no picture.
Unplug wait 10-15 minutes reinsert plug and it works. Sony's solution so far, unplug it, wait, reinsert plug. Not a good solution.

I have tried just switching ...

Do you have the box set to auto-shutdown after 30 minutes? It might be a bug in the auto-shutdown, that is set to well, shut down after 30 minutes of inactivity. Of course watching something isn't inactivity, but it might be picekd up wrong.

Also - can you provide an adb logcat after it happens ...

So i have noticed it to days in a row. By the way it is on the latest OTA without root.
I bought it two days ago. Yesterday it was working perfectly fine streaming from netflixs. Then about 3 hours into the session it abruptly stopped feeding video to my panasonic plasma HDTV. I could still hear the ...