Troubleshooting non responsive machine- Mach3/Syil x4

[Doddy]

Now I'm confused. Have a look at the electrical schematic here (Syil X4)

https://www.peu.net/syil/X4_User_Manual.pdf

If the schematic is to be believed, the E-Stop button will only isolate the power to the BOB when active, with the E-Stop input to the BOB wired to ground. Is this true of the actual machine wiring? (I think the OP suggested otherwise).