Can't Get PC To Work With New Video Card

[Carbo]

I have a five year old Dell Dimension 2400 that we use as a secondary rig. No bid deal or urgency here. About two weeks ago I figured it was time to give her a tuneup. Cleaned it up, formatted and reinstalled the OS, and bumped the memory to 1GB. Running like new.
Decided to upgrade the onboard card, and bought a new ATI Radeon 9250 256MB 128-bit DDR PCI.
Installation's a snap, right? Well, I thought so but I haven't been able to make it work. Boot up only goes as far as the Windows XP logo screen, stops for a few seconds and goes blank, and then the monitor goes into sleep mode. Pulled out the card and ran off the onboard video card and all is well. Put back the ATI and the same problem.
BTW, running XP SP3, P4 2.2 CPU, 1GB RAM, Norwood Micro 17" flat panel LCD widescreen monitor with a recommended native resolution of 1024 x 768 @ 60Hz.
Any ideas or suggestions? Thank you.

 

[imported_Kiwi]

Old PCs have a variety of places in their setup routines to disable onboard devices, and to enable other video sources. You need the manual for that mainboard, and the proper key press to start the Setup at reboot time. You may also need to go into the Windows Device Manager while running from the IGP, and tell the Device Manager to "Remove" the onboard graphics device. The PCI card itself should have included a manual describing some of this procedural stuff you've been skipping over.

 

[Carbo]

Exactly, Kiwi. After posting I did just that. Disabled the onboard video chip and then installed the new card. The PC picked it right up and it's working fine now.
Thanks.