just got my HDS8 hooked up and running and on the first trip out, after running 15-20 mins, the screen went into what i would call a "sleep mode". the only way i could correct the issue was to turn the unit off and back on. my question is: is this normal or do i have some setting wrong? posted this in the arkansas forum and got some good thoughts but wanted to spread it around a little more to see what else i could find.