I have s problem - I read thru similar posts on this site and have tried all the suggestions to no avail.

I have a Celeron 566 on an ABIT BX6 Rev 2.0 mobo - 256meg ram.

I had been running two video cards - one was a ATI xpertplay98 (Rage) AGP, and the other was the same thing in a PCI slot. I wanted better 3D, so I went out and bought a CardExpert GEForce MX2 (AGP).

Uninstalled the ATI AGP, put in the Geforce, turned it on, and didn't get any video, even during post. Did get 1 long beep and 3 short beeps, which indicates a video problem.

After futzing around with this awhile, I decided to go back to the ATI AGP card and start all over. But now that doesn't work either. Same thing - 1 long beep and 3 short ones on POST, with no video. However, if I put the PCI card back in and plug the monitor cable into that, it worked fine. So I got Windows back up and running using that method, but the ATI AGP card, while Windows shows it being there, has a yellow marker next to it in the Device Manager, and basically won't initialize.

I've cleared the CMOS, reseated the memory, changed the CMOS to initialize the AGP first (and I also did it the other way), but I still can't get the old AGP card working again. If I put the new card in (the GeForce2), Windows doesn't even detect it, while it does detect the ATI AGP card, but I can't get it to work properly. Also, when I run the CD that came with the new card (GeForce2), it tells me that there is not a valid device in the system, and won't go any further.

One thing that I thought was interesting, while using a system utility (Sandra), it reported that there was a problem with the ATI AGP card, in that there wasn't an interrupt reported against it. Shouldn't a card in an AGP slot be assigned to an IRQ?

I've also removed all other cards from the system and just tried booting it with just the AGP video cards (tried it with both cards). Still just one long beep and 3 short beeps. I've tried reseating the card and it appears that its in as far as it can go.

I'm wondering if I somehow messed up the connectors in the AGP slot and that's why it's not working. Seems to me that if it was a Windows problem, I would at least get video on POST. I'm thinking that maybe the only solution is a new MOBO, which might not be such a bad thing, anyway.

thanks for any help!

bobk