Green Screen Since Recent Sony Update

Maybe a HDMI cable. Even HDMI port on your TV. Try changing cable and ports.

I can check but doubt it. Never an issue before; only started after recent Sony SW update. Doesnt happen every time i turn on box but does happen 1 to 3 times per week. Otherwise, no issues.

Guest, you answered the question - an SW update. I don't recall anyone reporting a similar issue in the past.

You might try posting in a Sony support forum. 

That update may be a little buggy, I have a XBR55X900E and it reboots about 50% of the time when I turn it on, since the update. Also screen does a black flicker for a second or so, every so often, on all inputs and local channels. Waiting for next update and hope it gets corrected.