I found this: http://forums.techarena.in/monitor-video-cards/1378029.htm#post5131376
You can make a shortcut using
POWERCFG -Change -monitor-timeout-ac 1 as the location, then create a scheduled task to run the shortcut at a specific time. Just keep the "1" which is the time delay for how long until the screen turns off, then just have the scheduled task run one minute earlier than you want the screen to turn off.
The above link gives more of an explanation of what you can do/change with the command.
I JUST tested exactly the command i listed above, and even with my normal power settings to NEVER turn off my display, after running the shortcut and a quick minute later, my monitor went dark, a quick shake of the mouse brought it back. BUT, this SETS the timeout to turn off your monitor, so you may want another scheduled task to change it back to your normal whenever you normally get back onto your computer.