The gps sensor ,power cable and weather sense if you have them ,can be used on a new head unit. My unit developed an issue, which was not reconising the transducer. I returned it to Humminbird USA and it was promptly fixed. I am not aware of other units having your problem. Check on the standard cost of a repair at the usa site as this is the most cost effective. Still using mine a i love the 3D pallette when searching for dive sies. At least humminbird will repair an older unit. Garmin dont support units that are not current models and thier service and product support dont compare with humminbird . If looking for something new you cant go past the side immaging units i have an 1197si, this is one sweet unit.