[CentOS] Need help

[Richard]

> Date: Monday, March 20, 2017 17:24:02 -0400
> From: "Rosenthal, Shoshana" <srosenthal at cfa.harvard.edu>
>
> I did try other console  and it did not work.
> I did go from 6.7 to 6.8 but with centos not redhat.
> 
> 

Did you try another monitor -- one that you know works, and that
turns on when plugged into the outlet near the machine in question?
Also, some monitors go to sleep, so even an otherwise working monitor
may require a couple of taps on the attached keyboard to wake them up.