I have a RottenDog DIS200 inside a Cyclone System 11. Some of the LCD segments have been problematic since I purchased the unit second-hand: some segments were not always lit, or lit when they should not be. None of the segments are burned out. I've lived with it because it was not too bad.
Today I replaced the AA batteries in the backbox. Now the display is much, much worse. Same problem, but now the display is sometimes impossible to read because of incorrect LCD segments light/unlit.