Bolt Screen Flash

I dont think this issue has been brought up yet. My 500gb Bolt occasionally flashes on the right side of the screen. It is almost imperceptible but it is there. When a show goes to commercial, when a show changes scenes, and some other times. This was happening months ago, it went away but is back now. The Bolt is connected directly to my TCL 55us57 (wal mart model) 4k tv. I will swap HDMI cable. Restart the box.

Bolt Screen Flash