I have an older JD walk behind, 54"/17Kawi. The other day I went to start it knowing the battery was kind of low. Well the starter went cluck-clunk then everything went dead. The ignition light was out, the starter did nothing when I turned the key. When I pull the blade engagement knob nothing happens. The whole system was powerless. The only fuse I could find was on the engine was above starter, it was fine. Any ideas? Is there another rely somewhere? What would shut everything down? HELP! Oh, I put the battery on a trickle charge and it now is fully charged but still no power in the mower.