I got a weird issue a few days ago. I booted my computer, and my monitor was black. Everything was connected. I took the graphics card out and connected it again. The monitor then blinks, you can see the desktop for about one second, then the screen goes black, then it shows the desktop for about a second and goes black again and continues like that. I have had my computer for quite some years so i tried with a different graphics card (gtx 750ti) same problem. I also tried with the onboard graphics card and the problem is the same. Sometimes if I reboot my computer 7-8 times, it just works miraculously. What gives and whats the solution? I have tested with both hdmi and dvi-d cables, and I have tested with a different monitor as well.