The belt cover switch is shown in the picture below, it is a push button. Also check the brake switch shown it must be in the closed position (pushed up on the roller and the switch closed). Check that the E-Stop is not pushed, twist and release, also check that the chuck guard is completely down. There are 4 interlocks, E-Stop, chuck guard, belt cover and foot brake. It is not uncommon to have one of these switch fail or not be adjusted properly as to their travel (on/off position).
The schematics (see page 30 of the manual) are often not representative as to the actual wiring with respect to location (where the switch actually is wired into the circuit) and labeling.
If the work light is working, then you are getting power to the transformer and QF1 is OK.
When the machined is turned and the spindle direction lever is in the stop position, check that the KA contactor is on. If not then check the interlocks.
If the above checks out, then try the coolant pump. Per the schematic it is after the interlocks, but before the contactor overloads. You should also be able to hear the contactor click. If this doesn't work (or coolant pump does not turn on), then most likely one of the interlock switches is not working correctly. You can check voltage (24VAC) to each one sequentially.
With the spindle control lever in the STOP position, check the JOG. If rotation then you have an issue with the spindle switch. If no rotation, check to see if KM1 contactor is closing when you press the button. If the contactor closes, then it is most likely a dead motor. If no contactor activity, and you have checked voltage through the interlocks, then it could be an issue with the thermal overload relay.
You can also check voltages per the schematic, just be careful where you are poking, as there is a mix of 24VAC fro the control circuit and 240VAC on the high voltage. First see if the contactors are closing, then see if you are getting 240VAC to the contactor (L1 and L2)
Wire to terminal #15 should be connected to N (or one side of the hot), that you have power to the light, this indicated the transformer is powered (240 VAC to terminals 14 and 15).