Nothing happens when I turn ignition key LTX1000
I just bought a used Craftsmen LTX1000 (Model # 917.272450) last summer. I replaced the battery, plugs, fuel filter and air filter. It was starting and running great until last weekend. Actually it started up easily a couple of different times that weekend - I had to mow the grass at the lake on 2 separate days because I got rained out before I could finish. Anyway, the second day like I said it started right up and I was almost done when I noticed that the deck on the left side, as I'm sitting on it, looked lower than the other side.
I turned the mower off and looked under the deck - this is the side that has the turn knob that adjusts the height of the deck. I lifted up on the deck and saw that it did raise a little bit more and it looked more level with the other side. There was a nut underneath, so I adjusted that so that now my deck was a bit higher on that side. I also reached in above the deck and scooped out several handfuls of lawn debris.
When I went to start the tractor again nothing happened when I turned the key. It didn't turn over and acted completely dead. Although I had a new battery, I undid the wires and took a wire brush and sandpaper to make sure there was a good connection - still absolutely nothing.
So, what could be the issue? I did accidentally knock a wire loose when I cleaned out debris? Or is there some sort of safety switch that I disengaged or that happened to just stop working? Any help is greatly appreciated.