I recently replaced the mower deck switch on my 1989 era 430 as the deck was shutting down randomly. When I went to start the tractor, the "dash board" lights did not come on. But the engine would start. With engine running and hood open, the engine would immediately die if I tried to put it in gear or start the mower deck. After a couple of hours (grrr) I was ready to give up and leave it in the driveway! I closed the engine cover (hood) and tried once more --- and all ran (lights, forward/reverse, mow on/off) perfectly!!! Is there any safety interlock associated with the hood? I'm well aware of seat interlock and don't think that's a problem (although it could be). Is there a parking brake interlock? I'm not aware of that. Fuses look OK, but not an expert. Any and all suggestions appreciated.