Graphic card issue

Hi guys,
I need your help. I have got a strange problem with my graphic card as they are causing the screen to flicker and causes the screen to goes on and off. I have updated the driver and it don’t really do anything with it….I don’t really know what I could do.
Here’s the picture of flicker:

As you can see the flicker on VLC program, I have changed the screen refresh rate to 60 hertz, but it didn’t really helps. And the screen is goes on and off most of the time. I don’t really know what goes wrong and I never had an issue before. Do you know why I get this weird problems?
My graphic card is Gainwood Geforce 7800GS AGP3X 256MB.
Answer #1
Try tightening the connections on the cable from your gpu to the monitor. If that doesn’t work, try another cable.
Answer #2
also try pulling the card, clean the contacts with a clean pencil eraser, and re-seat it
Answer #3
Maybe its driver bug..try reinstall.
Answer #4
If all the above suggestions fail …. maybe it’s on it’s last legs. Time to invest in a new replacement card.
Answer #5
remove the card and put your Vga cable on board Connector then check it facing same problem or not?