With power off, remove and support the back panel.
Turn on.
Some lights on drivers will be on, because the steppers are powered. That is good.
Yes. Reasonably warm is normal. Hot when you are doing continuous movement.
Using arrow keys in Mach3, the DROs should change.
Moving various directions, the step and direction LEDS on the drivers should change as you push the keys.
It sounds like it is in ESTOP state, regardless of what Mach3 says. You need enable signals to the drivers.
You can measure step (maybe) and direction signals with a multimeter. Refer to Config settings and my BOB diagram from post #3
Be VERY careful no wiring touches the chassis or the stepper connectors are loose while powered up.
Make sure they are secure whenever the power is on. Always check with the power OFF. One loose connection will kill a driver.
Forget the homing - don't even bother until you can jog with the keyboard.
Front panel removal? POWER ALWAYS off. Quill all the way down before removing screws. (clears the DTI mechanism)
Earthed wiring warning applies, ESPECIALLY here.
Estop wire and the silly, dumb, useless swinging plastic panel switch are in series and must be closed.
If the spindle runs, then this wiring is OK and no need to remove front panel.