new graphic card wont pass signal to monitor?

September 18, 2010 at 09:55:55
Specs: Windows vista , intelceleron d cpu 3.33ghz/1470mb
computer medion ms7255
new graphic card: gforce 8400 gd 256mb ddr2
I have followed instructions on the manual to uninstall original driver and disable the onboard graphics adaptor. After I fit the new graphics card in to the pcie slot and turn the computer back on the pc works and the fan turns but the monitor stays in stanby mode? Am I doing anything wrong? Thank you

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September 18, 2010 at 10:33:24
Some reasons for that behavior are:

Card not fully seated
Monitor cable not connected to the new card
A required auxiliary power connector not connected
Power supply inadequate
DVI port in use before drivers are installed

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September 18, 2010 at 10:45:28
The card is correctly seated
Cable is connected to the new card
No extra power supply should be needed (checked this)
Not using DVI port using AGP port

When I revert back to the onboard graphics adaptor everything returns ok?

Thanks for your quick reply

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September 18, 2010 at 10:59:02
If the card is PCIe x16 the versions sometimes are not backward compatible with your PCIe slot on the motherboard. That card is PCIe ver. 2.0.

What is the full model of your power supply?

Do you have an 8400GS? The current draw on that card is 71watts = about 6Amps.

You may have just gotten a defective card too.

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Related Solutions

September 18, 2010 at 11:13:19
How do I find the full power supply?


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September 18, 2010 at 11:58:41
The power supply is the hardware that the power cord plug into at the top rear of your case.

There is a label on it with brand, model and ratings at each voltage. You may need to remove the cover to see the label or possibly even remove the four screws holding it into the case. If you need to do that there is no need to disconnect any wires.

Unplug from the wall before removing the cover.

Post all the information you read on the label.

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September 18, 2010 at 12:00:11
i see no reason to list psu specs, 8400gs is low end piece of crap, any psu can start it. Did set initial display to pci-e?
Agp port? Vga port.

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September 18, 2010 at 12:01:08
The 8400GS is a weak card & not very power hungry. I doubt the power supply is the problem. The card should work immediately after installation & at least display the splash / post screen. The post screen *should* display thru the card regardless of whether the onboard is disabled or not. OtH listed all the possibilities. Could be a blessing in's not a very good card & if you got for gaming, you're going to be VERY disappointed.

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September 18, 2010 at 12:05:54
PSU could be 180W for all we know.

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September 18, 2010 at 12:19:10
Intel cerelon d 356/355 system with 180w psu? I never saw that.

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September 19, 2010 at 01:06:55
ok, sorry about the delay in posting, the model is FSP300 - 60GTM

AC input 230 - 240v -, 33A, 50-60Hz
Max DC Output 300w
DC Output- +3.3v===> 14.0A (Org), +5v===> 8.0A (red), +12v===>18.0A (yel)
+5v sb===> 2.0A (purp) 12v===> 0.8A (blue)
(3.3v & +5v=105W max, +3.3v & +5v & +12v=280W Max)

I hope this means something to you :))

Im hoping its a faulty card, so gonna try to exchange for a replacement, will keep posted, thanks :)

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September 20, 2010 at 12:04:22
Nope, changed card at shop for another, and still no joy, same thing... Weird thing is, if i leave the graphics card in the pc but return to plug the monitor into onboard port, still samething, and i can only get my monitor back on if i remove the graphics card?? So it can only be something to do with the card being in the machine.

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September 20, 2010 at 12:10:45
That is the way things are supposed to work. The add in card automatically disables the on board graphics.

Download and run speed fan to see if your voltages are up to snuff. Get speed fan at the link below.

When you insert the card does the tab that you secure with the screw line up evenly or do you need to force it? Did your card come with an extra bracket?

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September 20, 2010 at 13:57:13
im pretty sure the power isnt a issue, as ive read a few reviews on the card and its needs aren`t paticularly much, i never bought so much for the gaming reasons, more that the onboard graphics was pretty pants and struggled with basic tasks.
As far as the fitting, it fits snug against the casing and is deffinately inserted correctly and no further brackets or anything were required, baffles me, it should be simple like you say... remove old driver, install new card and run driver cd, from what i hear even without the drivers i should still pickup a signal from the new card.
One more thing to mention, the monitor has built in speeker, and so it used to connect to the port and then a seperate lead came off of the monitor lead to plug into the onboard sound controller, could this cause any conflicts?

*Edit* Just emailed the manufacturer to see if they have any ideas too

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September 21, 2010 at 09:46:19
manufacturers email, said it should be a case of setting primary video device to pci-e in bios and saving it, but i cant find any mention of pci-e, checked everywhere including bios, cmos and integrated peripherals setup or something along those lines, if its any help my bios is phoenix award v2.4.

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September 21, 2010 at 10:11:15
That shouldn't make any difference. If the current setting is for on board it should just skip over to the add in card.

Your power supply is still suspect until you post good voltages. Especially the +12V.

As far as the setting you mentioned you are just overlooking it. What it should say is default video device. Choices are integrated or PCIe.

Because you have an OEM rig that option may not be visible. As I said, it shouldn't matter anyway.

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September 21, 2010 at 12:30:42
Othehill is always hung up on power supply, and for good reason mind you. There are a lot of crappy ones out there. But your new card has hardly any draw, and the problem seems to lie in the bios settings. Looks like you were onto it in your last post. Don't know your bios, but if it's like most, (most are), it's a simple flip of a screen button. Good luck and happy gaming.

There is a way to do everything

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