Using a second monitor and sleep mode

[kiddk1]

I just installed a second monitor on my macbook pro OS X 10.9.5 Mavericks, the issue is when I close the lid on my macbook, the monitor does not sleep which is what I wanted. I realize I can use opt-cmd-eject to put both units to sleep. Is there a way i can have the 2nd monitor go to sleep in clamshell mode?

Thank you

 

[ActionableMango]

I don't know, but you might get better help in the MacBook Pro (laptop) forum. This is the Mac Pro (desktop) forum.