Solved it! If any one is interested, here's the solution that worked for me.
SSH in as root and type this:
That will tell you the current setting. In my case it was 0, for off.
Next, edit GRUG commandline:
Look for: GRUB_CMDLINE_DEFAULT
In my case, this was in my file:
I add 60 (for seconds), you can add your desire setting here (in seconds though).
Then close the file and save it, and run:
Now, reboot and wait (60 secs, in my case), and the screen will go blank if idle. Hit any key to activate the screen and use as normal... (again, if idle, screen will go blank).