[JH] [JH11] DS500X

[John - Raymarine - Moderator]

This sounds like you have more then one depth source on board. The first step to identifying where your depth is coming from is letting us know all of the electronics on board.

For the DS500X you can check that it is still receiving good voltage at its power connection. Then you can check the voltage on the pins of the cable when removed from the unit. If you see a voltage on the connection to your power and on the pins then something has failed inside you fishfinder. The pin out for the connector can be seen below.