Marine Electronics Questions? Ask a Technician for Answers ASAP
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Does the screen actually say
or does some other indication come up on the screen? it's a detail that could be important.
It's possible that the sonar transponder has a problem, or your 334C is not in touch with it. I will instruct you how to check on it as appropriate.
What comes up on the screen when you try to access the Sonar page ?