I have a Murray 12.5 40" mower that won't turn over.

Jumped on it this spring and it turned over maybe 1 1/2 times then went dead. It first sounded like a bad battery so that was replaced. I then replaced the following items: Starter, solenoid and ignition switch.
Still nothing.
I turn the key and nothing happens, completely dead.
The ground looks good and I can jump the starter with the battery via cables and it turns over.
I can jump the solenoid top two posts and the starter turns over.
Seems like I am getting power but there has to be a short or something somewhere.

I took all three safety switches off and tried to start it, nothing.
I jumpered all safety switches, nothing.

I'm at a loss.

Model 40542A
Serial 7318910472l00336
MFG Date 97104

Hi,
At the risk of asking something stupid, did you check the fuse?
Two attachments, both schematics with one visible and one pdf (I like them for printing better.)
Peace,
Clarke