I the location of my 1198 is on the console, its got bump and by a stump and pull part of the plug out of the back of the unit. I notice when I plugged the unit booted up, started to run fine. Then for no reason the unit started to load charts, I hit one of the short cuts to bet back to down scan or side imaging, and it was black. I rebooted unit and worked fine, until I changed to map when I was running the lake. I when back to the down scan all back again. I even swapped units between he bow and the console. I placed the bow unit on the console and worked fine. Does this sound like I need to contact Hummninbrid and send it back in? Or if there something I can do? Hopefully the group can help me.