Yeah, I think that has been said now.... 3 times?
Second, you can really fry stuff if you don't plug everything in properly. The fact that you went from getting something to getting nothing scares me.
The light on the monitor is called the "spot killer" when it is on, that is bad news. You may or may not get a bright white dot in the center of the screen. That dot causes monitor problems if left on too long, i.e. strain on the deflection beam.
Make sure that EVERYTHING is unplugged, first.
You really need to check the voltages on the power supply, then on the AR, and finally, if that is ok, you can plug the main board in.