Sears Free Spirit Treadmill won't start?

My old Free Spirit treadmill just stop yesterday and won't start again. I unplug, reset, replug, nothing. The timer and display goes on, timer start and after 10 second I get a l5 error. The belt do not start at all. I did remove cover and snoop around. I see two red led light that are on on the motherboard, could it be the issue? Any help would be appreciated. thanks