Solved Secondary Monitor stopped working

have a 32" HD TV which I use as my Primary Monitor(connected using HDMI) and a Lenova 17" as a Secondary(connected with vga cable). I shut the desktop down, unplugged the 17" to use on another pc.
When I reconnect the 17" to my main desktop it now does not pick up
Any Suggestions?

Whenever you disconnect the monitor you will have to reconnectr manually.

(WIN) P ____ then choose extend to extend to both screens

THe problem was it was connected to the wrong graphics card.... Silly mistake
Thanks for the answer though!!!