Screeching noise from fish finder

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marlattrr

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I was out fishing yesterday and I believe my fish finder was causing a loud high frequency noise. It would come and go. It sounded like nails on a chaulkboard.

I cant pinpoint what it was but it stopped when i turned off my fish finder. I have a Lowrance Hook 7 tripleshot.

Im not very good with fishfinders but this cant be good for fishing! I tried google searching but didnt find much on this. Can anyone hrlp? Thanks.
 
poorthang said:
i used to get a noise exactly like that. it stopped when i starting leaving her at home.
Like it's all dried out and needs to be re-hydrated (as in the "deep six")...
:)
-W
 

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