I have been using an LX-5 for years and have found myself becoming dependent, so I know my way around their features. My buddy “the IDO lurker” bought one last year during the infamous $299 special. He asked me to help him run it this ice season and I just cannot get it to perfrom like the other LX-5s I have had my hands on. I set it up in 7 feet of water today in order to begin teaching him the basics. To my suprise, I couldn’t adequately find the bottom. I could locate it, but not like on my graph. I had the red line at the surface, and I found yellow lines beginning at the bottom with the gain turned at 2. I began increasing the gain to turn the bottom red, but it just never showed up. I had the gain maxed out at 10 and I couldn’t get a solide “red” bottom. The best I could get was yellow with a glimpse of occasionaly green. I thought perhaps it may be a strange bottom, so I replaced his Marcum with mine in that hole. Mine performed flawlessly and I resumed teaching him the basics using my graph. I checked all of the settings and the battery. It was a brand new battery and the settings were correct. Does anyone have any idea what could be wrong or whom he should contact to get the problem resolved?