I went in the basement and got my HSD 5 out and tried to find a 55 foot hole. I have a set of power cords thst allow me to run it off a 12 V source off a battery / car etc. I could not find a hole of 55 ft? Fishkiller, what graph do you run? I was playing with it and switching between screens and then decided to turn it off. It wouldn't turn off?? I pulled the power cord and it went off. I rebooted it and it went to the same screen - it wouldn't let me do anything?? I said good night to it. Today I started it and it seemed to work OK. I couldn't get a GPS fix but that may have been to my location. Electronics - when they work they work GOOD. When they don't they drive you CRAZY.