I have it on "both" , left & right. The right side of the screen is always bright & the left side dim. There is no blockage of the transducer & the transducer is level with the transom. I feel like the problems is in the settings but I can't figure it out. Any ideas?

"When you've stared down the barrel of a shotgun in your own home, 3rd & 20 don't seem too bad"......Ken "Snake" Stabler