Had main board and some other board replaced. Still does it. Repair lady couldn't see it. I told her my wife only sees it at night. She wanted me to email her a video of it doing it at night, but I have no video camera. I emailed her a link to this thread,hopefully she will forward it to Samsung
It needs a firmware fix like Panasonic did.
On another note, I put it up for sale. Anyone want to buy it? I am the only one who can see it, apparently. Going back to Panasonic, since they have a confirmed fix.