No signal to monitor/ can't turn off computer

JJ - Aug 4, 2016 at 03:28 PM
Hi I have an Acer running Windows Vista .
And I here all the fans come on so I turn on monitor and it says no signal I know it's not the ram,VGA cord, or power supply. I also hooked it up to my TV and still got no signal. Also I can turn it off without unplugging the power supply. Please help.

In the back of the computer one of the things to screw in the VGA cable is missing does that something to with it?