Monitor Not Working when connected to Graphics VGA Port

Hello Everybody.
My PC (Win 7 Professional x 64 bit) was working fine until yesterday.However today morning it wasn't.
At first, as soon as i pressed power button, the monitor shows the "ECS" screen as usual (my motherboard : ECS H61H2-M4) but unlike loading into win 7 startup it just hangs there for a while and shuts off and then pc keeps rebooting and shutting down until the power is cut.This is not the first time, so i had found a way to fix this a long back and i did the same. opened CPU, disconnected the HDD and then powered on, again Powered off,Now i reconnected the HDD and Booted.This time the Fans were working fine which implied the pc was running,but the visual was not there. after few attempts i found out that with the motherboard VGA port the monitor works fine but with the Graphics Card VGA the screen remains black with "no signal " in the first few seconds.
i tried everything i could think of and got to know from google.i tried reseat the ram( DDR3,4GB), Processor (i3,3.2GHZ), Graphics Card(Nvidia GT 640 DDR3 2GB) and even cleaned the the hardwares but no luck with that. Next i started the PC using motherboard Vga port and uninstalled the Nvidia drivers and tried installing again ,only to find the message "your driver hasn't found any compatible hardware.Iopen command prompt and enable hidden devices to 1 and open device manager, there was no sign of my graphics card. not even a device with yellow mark.Next, i rebooted and open BIOS menu but i couldn't find the graphics setting in the advanced setting tab. there is no option for graphics there. there was another menu called M.I.B where i could find only intel graphics setting and overclocking menu.

I even tried re installing the motherboard drivers but no luck. the pc runs with intel graphics if connected to motherboard vga port.
please help me solve it. Anyone .

to get an idea of my BIOS menu please click here:
P.S: images are from google.

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How can you be sure

How can you be sure the Nvidia 640 GPU is working? The story sounds like a failed video card. At the shop we try this card in some other PC and one of the shop cards in this PC.

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Monitor Not Working when connected to Graphics VGA Port

if the video card is bad, then how come the graphics card fans are running? as for power supply there is no extrat 8 pin or 6 pn connectore.
plus i would like to remind you my pc was working fine until yesterday night and i was playing Sims 4, Hiitman Absolution on it.

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Re: fan

That the fan works doesn't mean the electronics of the card work.

Take your car, for example. If it doesn't start, but the radio works, and you used it yesterday, then surely you would conclude that something else than the radio is broken. You would call the garage or fix it yourself.

So now it seems you need to find a tech to fix it, or fix it yourself.

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well i see there'sno hope then. maybe one last try i can do is to take it to the shop.
Thanks for helping.#knees#R.proffit

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Nod to Kees.

The Nvidia 640 appears to have shipped in 2012. I feel no remorse here since it's delivered many years of service. Time to try another card in this PC and this card in some other PC to narrow it down.

Remember that since it pulls power from the motherboard it's possible to have a motherboard failure here.

Post was last edited on May 9, 2019 9:16 AM PDT

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since u mentioned motherboard, while cleaning today i saw a circle tablet battery embedded in it. can it be exhausted? no idea myself just curious.
as for graphics card, true i bought it 2015. though its many years from then till date, i havent used my pc in last 1.5 years. it was packed. it was only few weeksback i unpacked and started download new games and was playing till yesterday.

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This keeps happening

At first, as soon as i pressed power button, the monitor shows the "ECS" screen as usual (my motherboard : ECS H61H2-M4) but unlike loading into win 7 startup it just hangs there for a while and shuts off and then pc keeps rebooting and shutting down until the power is cut.

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And if you remove the old GPU card?

I'm repeating here but the test is to try this card in another PC and another card in this PC.

As to the CMOS BATTERY I don't suspect it. But at well under 1 dollar, why not change it if it's beyond a few years old?

Post was last edited on May 9, 2019 10:31 AM PDT

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extra power connector?

that remark of yours makes me wonder. Does your graphics card want extra power directly from the power supply? (Supposedly because the power you can draw from the bus is limited. Not having that extra power connection would be bad. That could lead to the card malfunctioning. It could also lead to the bus power lines to burn up or melt away, effectively trashing the motherboard.
But in any event, there could also be something wrong with the power supply all by itself. And with the graphics card being one of the big power consumers in your PC it might be more sensitive and just shut itself off.
I recently had a machine not booting and it turned out the power supply was underperforming (10.5 volts instead of 12.) Probably lightning (or old age.)
Putting in a different power supply - even with lower specs - fixed it.
So you now need to check your power supply, your graphics card and - just to be sure - the mobo (see if the bus lines to the slot with the graphics card work.) Also, if the card wants extra power give it that. In a crunch you might have to hunt for an adapter if your pwer supply doesn't have enough connectors (or just not the right one.) Of course if you need to get a new power supply you can just ensure you get one with all the required connectors. Ditto if both the power supply and the graphics card need replacing. And for your mobo: Good luck!

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If It Wasn't For Gaming ....

If it wasn't for gaming you could probably just use the onboard Intel graphics as it works very well for everything except gaming.
BUT, if you need to replace the graphics card, you can try an Nvidia GTX1050Ti. It is the best g-card that gets all its needed power from the slot it's plugged into on the motherboard. No need for extra power leads from your power supply. And it does gaming at Medium (or sometimes High) detail settings at 1080p. Of course, there are a number of more powerful g-cards if your power supply is up to the task of driving them. But the 1050Ti is your best option without putting any additional strain on the system.

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