John Deer 111: Just got it back from the shop after an expensive fix on belts and pulleys and half way through cutting the grass I stopped to pick up trash by the road. Lifted the deck and got off the mower but forgot to disengage PTO so it shut off. Now it wont start or even crank. Sometimes I hear a click but that is it. Is there a short in the safety switch? Any ideas? Thanks in advance, Brian.