Debian :: Monitor / Video Output Turned Off In Wheezy?

Fairly new to debian and linux and general. I have an install of debian wheezy (to run LinuxCNC). I went in the graphical interface to the 'monitor' section and changed the screen resolution. I had two monitors, one labeled monitor and another (I think) Lenovo Monitor.

There was a check box in the screen monitor window that said something like, "Don't use this display." I figured it might turn off the lenovo and default to the generic monitor listed. I clicked it and my monitor turned OFF!! I tried another monitor (Dell in this case) and same thing, no video output.

I asked on the LinuxCNC forum and googled, but I just dont' seem to be able to figure out what or how to get to the solution.

I have been able to Ctrl-Alt-F1 to open a terminal. But, I can't find any the right files and found that the xrandr command 'should' work, but doesn't.

Whenever I issued the xrandr command (other than man xrandr), I get "Can't Open Display"

I did find two outputs VGA1 and LVDS1 in this file /var/log/Xorg.0.log and this coincides with what I saw in the monitor window. These are the 'output' types and if the xrandr command worked I'd issue something like : xrandr --ouptut LVDS1 --auto

I read about xorg.conf, but I could not find any xorg.conf files in the etc/X11 folder. In some of the info I found, the xorg.conf was replaced in this or a recent version of Debian by something else and confuses me.

One person had a similar issue and he got to this directory: $HOME/.e/e/config/standard" and found files such as:
"e_randr.cfg" plus "e_randr.1.cfg" thru "e_randr.9.cfg"

But, I can't get to that folder. How to turn on my monitor display?