2nd monitor suddenly stops connecting, how can I fix it?

[ComputerOnFire]

I am using a Nvidia GTX 560 and it has picked up both my monitors fine, however every once in a while my 2nd monitor connected through HDMI stops being detected by my computer. I fixed this in the past by restarting my computer, updating my graphics driver or just reinstalling it but I can't get it to work that way this time. This tends to happen overnight if my computer gets put on sleep or a screensaver comes on.

 

[ComputerOnFire]

Decided to use a VGA cable to connect to it in the mean time until I get the issue with the HDMI connection fixed.