My Samsung TV will start showing bad artifacts like there are compression dropouts on the HDMI. The first time it happened I tried swapping cables and Blu-ray p

My Samsung TV will start showing bad artifacts like there are compression dropouts on the HDMI. The first time it happened I tried swapping cables and Blu-ray players but it didn't work. Finally I unplugged the TV and plugged it back in, and it's all good. I've had to do it twice more since then.