I have a 7 speed, 42 inch cutting deck troy built pony mower with a 17.5 briggs and stratton engine bought in 2005 model # 13AN779G766. When you turn the key nothing kind of like the battery is dead. I've replaced battery, made sure all connections are still connected, check fuses that I could find, and made sure that blades are really disengaged. Of course have done everything that you have to do to start it (brake, blades, sit on seat, etc.). Wondering if anyone had any ideas. Thanks.