I have an HDMI cable going from my GPU to my monitor. It was somehow working itself loose and interrupting the signal to my monitor. How it worked itself loose is another story, but I digress.
I was looking at the back of my computer, (scratching my head) looking for a way to secure the HDMI cable and noticed that I had to other connections on my GPU that had screw-on connections. The one on the left is the standard VGA hookup and the other on the right is a Dual Link DVI-I, HDMI, VGA connection.
I measured the distance between the screws and it was the same.
I had an extra VGA cable with a connector exactly like the one in the picture below.
I cut into the blue part (using a hobby knife) of the connector, the part with the screws attached. Being careful not to damage the cable underneath. (See yellow dotted cut line on blue VGA connector)
Once the cut was made, I spread the connector apart until I could remove the cable and it's housing from the blue connector.
Then I just feed the HDMI cable into the now removed blue VGA connector, screwed it in and now the cable is secure and will not be able to work it's way free interrupting my monitors picture.
You must have a setup similar to the one in the picture to be able to do this.