I also bought an SG II after using the first model in my 05 FWD FEH for many months. Mine will sometimes come on , cycle thru the display colors and hang. Sometimes only the top display line shows up with line 2 blank. I just unplug the RJ45 plug from it and reseat it. This has always cleared the problem. I don't use the trip info so it doesn't bother me that much. I don't think I have ever lost any setup data..... maybe I better check...

Mike