No video output?

[Cyrissis]

Hi guys. I like to think I know computers pretty well, but I'm baffled. I started a game up earlier, but as soon as I did, I lost all video output from my computer. Unplugging the HDMI cable from my monitor and plugging it back in gave me a few seconds of video output before it stopped again. Strangely enough, the light on my monitor (which is green when receiving input) is lit, despite looking as though the monitor is turned off. I've tried swapping HDMI cables, changing graphics cards, and unplugging certain unnecessary components to save power in case I was over-doing it, but nothing. I'm certain it's not a heat issue, as every component is cool when the computer is running.

If need be, this is the hardware:

600w power supply
nVidia Gforce GTX 650 (primary card)
ATI radon HD 5830 (Output dropped with this also)
8gb of some cheap DDR3 RAM I got online, but I'm certain the issue isn't this.

Any help would be greatly appreciated.

[Cyrissis]

Oh, motherboard is a Gigabyte H55M-UD2H. It's a cheap gaming PC I threw together a few years back, and has ran flawlessly until now.

[Lisa_maree]

Hi

Do you have another monitor to try. As it seems like a faulty monitor rather than the computer.

[Geek-9pm]

Sometimes you can cycle a monitor on and off a few times and it responds.

[fozzer14]

I would say to try a monitor like one of the members has already suggested, or it could be the motherboard i think this because you said you have tried changing cables and graphics cards and so this leads me to think there is something wrong with the motherboard. I would try the graphics card in another computer and if it works you know there is something wrong with your motherboard if it doesn't then it could be the monitor.

let me know how you get on.

cheers.