Wonky depth readings form Simard IS12

[witzgall]

Hi;

We have a Simrad IS 12 Combi display. It was purchased used a year and half ago. THe depth transducer we bought new, as it was not included.

A few months ago, the display started showing the true depth, then a much higher value, back and forth. At first, powering down then back on seemed to fix things. Now, it mostly shows the higher depth, and once in a while, the correct one.

I have checked and double checked all of the connections. Any idea on what part of the system is at fault? Display, cabling or transducer?

Thanks in advance for any help.

Chris