OK....Just tested it n it is fine. When I crank it....The screen goes blue n then I have to push the mode button again to get the screen back up. SO...Yesterday I stopped in to the local advance parts store n they tested the battery. Said it was good but my alternator was goin bad. SO....Thats how I got here. NOW....Why is it doin the blue screen thing? It runs great n always cranks. THANKS FOR THE INPUT/EDUCATION.