[CA11] DSM30/Airmar/E120 Fault Isolation

[mistertj]

Thank you for responding. I have gone through all of the FAQ info and double checked my system...connections, power levels, etc. Everything checked out. I have noticed though that if I do a DSM reset, that the depth finder will eventually settle and give a good and correct reading. Then after a while, it (the picture on my E120) will go haywire and the depth reading will disappear. See photos. So, maybe it's my DSM but rather than purchase a CP370 at almost $600, I'm thinking a used DSM30 for $125, to see if that's my problem is a less expensive approach.