graphics card dilemma

ok, my sister bought a graphics card with all her christmas money, just to bring it home and install it and to find a blank screen on the moniter. we tried everything from check the wires to check with some friends and other places. then we ended up just switching it from agp (its an agp card so its plugged in the agp slot, duh) to pci/onboard and after a reset, it worked, until she decided to install the driver, then all hell broke loose, we tried countless things then she decided to disable the onboard gpu, which resulted in the inability to re-enable the gpu and a few chairs flying across the room aswell as a seven hour deadline to get it fixed by morning or she might kill me in cold blood, I'm thinking of switching it over to vga againg, but I'm worried if it wont work and I wont be able to switch it back again :(

its a Radeon 9600 SE and its on a 2.4 ghz ati athlon running xp with 512 mb of ram.

1 clear the bios to reset it to onboard graphics
2 ???
3 profit

>>1

1. return to place of purchase
2. demand a replacement for faulty product
3. post aforementioned sister's boobs on /b/
4. ???
5. profit

um, I'd better update and rephrase on this question.

when I installed the card it didnt detect, the pc has two settings for output:
-pci
-agp/onboard
there is an onboard gpu and a agp card in it, but the card doesnt want to work, we get a blank screen, but the onboard works fine.
I'm wondering how I get it so we can use the agp card.
we tried disabling the onboard, which resulted in some plug and play thing to start up running off the cpu, but the card still wouldnt detect.

I need this fixed in three hours

>>4

"I need this fixed in three hours"

I guess you're fucked, then.  Hehheh.

Why do you need the fix so soon?

I had a problem like that on a old comp.
I tried to install a 9250 256mb card on a 5year old motherboard...
Needless to say drama ensued. In the end I just took the card out and reset the bios.

somthing happened to me like this about 9 months ago with an ATI radeon 9600se 128mb ram. As said the screen is just blank I did everything imagenable to fix it but to no avail. I took it back and got an ATI radeon 9550 256mb ram, and over clocked it past what the 9600 was clocked at stock. It works great but I had to buy a fan to replace the passive heat sink on it. oh and the OC was 250->420MHz core, 198->220MHz memory.

you are an idiot.

To fix your problem, disable the onboard video. It IS USING THE AGP HARDWARE. You cannot have a card in the AGP slot and use the onboard video at the same time.

you fail for installing components in someone else's machine with no knowledge whatsoever

try getting in AGP " legacy " mode :
get in the BIOS and search for
-disabling AGP Memory aperture size
-setting in AGP 4X or lower
-get the VGA onboard off so the comp will have to switch to AGP