I have a ? I recently purchased a 997 c si and tried it yesterday for the 1ts time . the 1st 2 mins it worked great then all of a sudden the right side of the image went out ,i checked the settings and all is good nothing blocking the right side ,black screen on the right ,unplugged and plugged the transducer same thing , put it in demo mode and both sides work ,...any idea of whats wrong / I think I might have a defective transducer