I just purchased a used John Deere STX38 riding mower in almost new condition. It has a black deck. I was mowing this afternoon and hit a tree root. The blades did not hit the root, but the root caused the deck to fall to the ground. I stopped and looked underneath, but I cannot see how it connects. The deck lift lever does nothing now. I am thinking that it is something simple, but the mower is new to me and I am not familiar with it. Someone with more experience with the STX38 most likely knows what the problem is. I really want to finish my lawn tomorrow if I can get some advice here. Thanks!