21" self propelled ego. lazt time used, 2 weeks ago, after mowing 30 minutes, i stopped. on trying to restart, blade spun briefly, then blinked orange and stopped. after a break, it worked, so i thought maybe an overheating issue. however, this morning, same problem. fully charged batter, starts to spin and in anout a second stops with blinking orange light. mower is about 2 years old. any ideas?