My PC has 5 PCI SLOTS, all full.  When I replace the old sound card with a new ONE the computer will no longer boot. It turns on but the screen never even comes on to show bios loading or anything.  If I remove any one of the PCI cards (except for video obviosly) the computer runs fine even with the new sound card.  I need all 5 cards (video, WIRELESS ethernet, USB, ATA133 IDE, and sound) so I don't know what to do.  Any help would be greatly appreciated.[highlight]When I replace the old sound card with a new one the computer will no longer boot.[/highlight]

But, will it boot with the old sound card
using  all 5 slots?YesYou appear to have an IRQ conflict.

Your new sound card may have an automatic IRQ assignment that is
conflicting with another piece of hardware.

Is your BIOS set for Plug and Play?

You may even need a BIOS upgrade but, that should be done as a last
 resort.Yes, the bios are set to plug and play.Set assign IRQ to VGA option to No in BIOS can you do this?I don't have that particular option.  I have PCI VGA palette Snoop set to disabled.

PCI Slot 1&4 Priority    Auto
PCI Slot 2 Priority        Auto
PCI Slot 3 Priority        Auto
PCI Slot 5 Priority        Auto
PCI device SEARCH order   First to Last
Default Primary Video    PCI
all IRQs set to  PCI/PnP

As well as many OTHERS, but these seem most relevant.Is the sound card in PCI slot 3?
If you uninstall the sound card in the control
panel and reboot with it in PCI slot 3.......
What happens?