Don't panic until you check it out with more light. It is giving you a video signal, so toast isn't quite the word. I was expecting solid color bands in black or other primary color as can be seen with bad imagers and displays. It is practically dark in that room and you've got a high contrast situation with that window. Could be a time of day thing. Time of year (different solar arc). Light bouncing off a vehicle, wall, ... if you're on the ground floor.