4850 not detecting screen

Asus Ati radeon hd 4850
July 12, 2009 at 05:50:53
Specs: Windows XP
I bought a premade system, I connected the blue cord with the 2 pins for the screen (dont mind my noobness) into the mobo instead of the 4850. Installed os/drivers everything. Realized the computer is still using the onboard hd 3200. Turned off computer switched the blue cord into the gfx card slot, windows loads up fine (i can hear it) but the screen is black.

Do I uninstall drivers? change something in bios? I'm not too knowledgeable on computers and I'm not comfortable with opening up the case etc if that's what is needed

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July 12, 2009 at 06:33:43
You have onboard graphics and a graphics card?

Installed the os using the onboard and now you get a black screen when connecting the monitor to the graphics card.

Right click on "My Computer" scroll down to properties ...click ...click on harware....click on device manager.

Is the graphics card listed and is there a yellow ! mark on it?
If so you need the drivers for the card.

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July 12, 2009 at 06:45:12
under display adapters it only shows the onboard ati radeon hd 3200, nothing else.

im sure the 4850 is installed inside the tower because theres 2 blue sockets where i can insert the blue cord for my screen, 1 where the mobo is and the other is where the 4850 is. maybe its not connected/plugged in properly?

what should i do

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July 12, 2009 at 07:54:08
hmm i just checked the device manager and under display adapter it only shows the ati radeon hd 3200. the system is supposed to have a 4850, could it be they didn't install it at all or it wasn't plugged in correctly?

i mean the 4850 has to be there right if theres another blue socket other than the mobo 1 where you can put the monitor cord into right?

my tower also has a window on top where i can see in and there is a video card there, im just not sure if its the hd 3200 or the 4850 card? please tell me the hd 3200 is the onboard D;

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Related Solutions

July 12, 2009 at 08:27:53
I had a similar experience when I had a monitor plugged into a HD AIW card in a PCI-E X16 slot on an Asus M3A78 Pro mboard, which has onboard ATI video. The onboard video is was not disabled automatically when I installed the AIW card in the PCI-E X16 slot. I found when the card was installed and I pugged the monitor into the onboard video port I had video.

Go into the bios Setup and set Intialize Display First, or Primary Display, or similar, to PCI-E slot, or similar, rather than onboard video, or similar.
E.g. for the Asus M3A78 Pro mboard, that's in Onboard Devices Configuration - Primary Display Adapter
choices are onboard, PCI, and PCI-E

I have no idea what this blue cord is you're talking about.
If it's a cable for Crossfire support, it's supposed to be connected between two connectors on two cards in slots, only. The card often comes with it, or the mboard may have come with it. .

The 4850 card MUST have an additional power connector from the power supply connected to it.

The 4850 probably has two monitor ports. If so, one is Primary, the other is Secondary. Sometimes when you connect a single monitor to the Seconadry port, you get no video. Try connecting the monitor to the other port if you get no video.

If your mboard has two PCI-E X16 slots, a single card must be plugged into the Primary one, the one closest to the center of the mboard.

When you change which port you connect the monitor to, always do that when the computer is not running.

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July 12, 2009 at 08:30:16
"i mean the 4850 has to be there right if theres another blue socket other than the mobo 1 where you can put the monitor cord into right?"

I doubt an HD 4850 would only have "blue sockets". DVI & HDMI ports are becoming more & more popular...VGA (blue socket) is falling out of favor. Most ship with DVI ports (white socket) & an adapter is used to convert to VGA.

Here's what they look like:

VGA port

DVI port

HDMI port

S-video port

And here's a look at a Sapphire HD 4850. Notice it has two DVI ports & one S-video, but no VGA/blue port:


I suggest you unplug the power cord, open the case & see what's inside.

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July 12, 2009 at 08:40:01
It is possible that the plug and play option is turned off in the bios. I believe it is the onboard configuration section.

It should be on.

If off turn it on and restart the computer and it should come up with "Found New Hardware"

If it is on then try resetting the card and restarting. Being sure to turn off and unplug the computer before resetting the card.

All of the above post sound good too.

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July 12, 2009 at 09:37:08
thanks for the pics jam, the card i have is" SAPPHIRE 10245HDMI RAdeon HD 4850 512MB 256-bit GDDR3" it has 1 vga port, 1 dvi, and 1hdmi port.

with everyones suggestions aside if the device manager/display adapter isn't even showing the 4850 there in the first place and only shows the hd 3200 it means the guy who put together my system didnt push it in all the way or something wasn't plugged in correctly right?

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July 12, 2009 at 11:39:07
See Response 4!
The 4850 card will not show up in Windows, and you'll get no video from it, until you change the setting in your bios

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July 12, 2009 at 12:04:18
Nope. Brought it back to the store and the guy helped me out on the spot, fiddled with the wires for the 4850 (guessing they forgot to plug something in) checked the device manager again and there it was, 4800 series, the 3200 was gone. Thanks for all the help anways.

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July 12, 2009 at 14:56:30
Well in that case, either the card wasn't all the way down in it's slot, or someone forgot to plug in the extra power connector from the PS into the card - you could have fixed those things yourself - the blue cable probably had nothing to do with your problem.
By the way, make sure the setting in the bios - Intialize Video first or Primary Video or similar - is set to PCI-E - if it's PCI, the video still works in Windows but Windows won't support the superior PCI-E only features of the card.

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July 12, 2009 at 18:11:36
You could also disable the onboard video in the bios if necessary, but you probably won't need to.

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