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Looks like the high chirp is getting some interference. Might try cycling off any other electronics on board, and checking your transducer cable and pins. The crack in the screen could be troublesome too? If your transducer is not directly in the water, you might want to check for bubbles (although the downscan does not appear bad). Make sure you have the right transducer selected in the setting also. Is the "4X" on your unit scroll speed? If so, I would turn that down to normal.
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