Take a look at this info: http://support.microsoft.com/default.aspx?scid=KB;EN-US;q109845 Might be a memory problem, and removing, cleaning up, and reseating the memory modules might do the job. Could also try removing CMOS battery for a period of time and then re-inserting it.

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DAVEINCAPS So why would the monitor and video card be doing their jobs until I get the second splash screen and the bam "Signal Error" & black screen. Also the PC is pluged into a KVM switch and the other PC's are doing fine off the monitor. Plus originally I would switch the PCI slot and it would work until I reboot. And no warm booting. The PC shuts down properly but will not come back up as far as the monitor/graphics card is concerned.

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Somewhere in the process of the OS loading, some file, command or driver is causing a problem that results in the computer shutting off. (I assume it's shutting off--or is it just blanking out while the machine continues to run?) Before windows loads there are no conflicts so everything seems OK. As FZWG points out, RAM could be a problem as that's one reason himem.sys doesn't load. There's some ram checks you can download that should tell you if that's part of the problem. Unless it's the video drivers, temporarily swapping the card with another should tell you for sure if it's the card or not. You could also try reinstalling the drivers when it's working to verify if that's a problem or change the adapter to a default 'pci video adapter' so windows will use different drivers. Another thing, unlike ISA, moving a PCI card causes the OS to reconfigure it. Maybe that's why it works when you move the card to a different slot. You might want to check cmos again and see if there are any alterations you can make to the PCI bus.

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