Screen goes black but power button still green

Ok - problem is that my monitor randomly goes black. I say goes black, not turns off, because the monitors power button stays on(green lit). My monitor is a 23 inch TV that has a VGA connection on the back. Its an Insignia(best buy brand).

When it goes black all I have to do is push the VGA button on the remote and the picture will come back. Some times it goes black within a second again and I push the button again. I do this usually 4-5 times and the monitor will start to "cycle"(going black and showing picture) about 3 times then the picture will stay on. Some times it stays on for hours - some times the problem happens within 5 minutes. Here is a video in case my description absolutely sucks.

http://uk.youtube.com/watch?v=Zs43qTTBIe...