I received my new TV this week-end and proceeded with the upgrade to the latest version (2011-10-21).
But, I'm not sure that there were no problems with the older version because I don't tried to put the TV in sleep mode.

Randomly, when I wake-up the TV or switch on with the breaker, the screen stays black. If the TV is on with an active source, I can hear audio and Ambilight works fine, but no image.

Is someone experienced a similar issue?