I have a CP370 and E140W on my boat. I have both a P66 and M260 transducers, only connected one at a time. With either one of the transducers connected, sometimes the MFD will just lose the transducer readings. It will read insanely deep or shallow for where I am or it will just not read anything. It will work fine for a few hours and then just stop. It doesn't matter which transducer is connected. Any ideas for things to look at? The CP370 is less than a year old and has a dedicated power connection to a fuse block. The voltage at the CP370 reads above 13 volts.
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