Hey all, I bought a new chirp 4 last season used it about 10 Times and loved. This year I am having all sorts of issues with it. I have watched what you tube videos I can find on adjusting settings. So here are the issues. It will mark depth and gps works fine. Sometimes my depth will jump constantly about a 4'-5' difference say I'm in 20' it will keep switching from 18'-24' this is in flat bottom no weeds or current. It will not mark my jig or lures I switch between high chirp med chirp, 200, 85, and nothing I am catching fish and those are not being marked either. This is happening in water deeper than 15' I am running sensitivity roughly in the high sixty low seventy range if I go higher the screen turns all fuzzy and black. No other fishermen around me so not getting interference from other units. Any thoughts would be appreciated. I checked ducer cable and did not find any damage. Thanks ahead of time.