Before I contact Humminbird support, I'm asking if forum members have experienced similar problems.
My 997 always had intermittent problems displaying the port side image display since it was new. I used to think that the problem had to do with weeds accumulating on the transducer, since backing the boat up would often solve the problem. But lately the problem has gotten much worse and I can only rarely get a port side image. I've eliminated weeds as the cause of the problem.
Here is an image with both sides working:
Here is what I usually see now:
The problem is still intermittent and you can see partial recovery of the port image in the following 2 images that were taken in sequence:
I am beginning to suspect an internal wiring issue in the transducer since hitting a wave or backing the boat can sometimes restore the image. Moving or reconnecting the cable at the head unit has no effect.
Has anyone had a similar problem or have any ideas as to what is going on?