Hi there,
Please give the group more information about your new computer system, CPU, HDD, Graphics Card, any Network Interface Device periperal card, amount and type of RAM.
Also does your system POST, and go through the System Setup, Boot loader, OS Loading, to the desktop?
If your system does POST, click on del to get to the System Setup, and look on the Integrated Peripherals sheet, at the LAN choices. If you have no add in NIC, the Onboard H/W Lan should be set to "Enabled", and onboard LAN boot ROM to "Disabled".
If both are set properly, and you can boot up tothe desktop, Right click on "My Computer, to the System Properties dialog box, and choose "Hardware", then "Device Manager" . Look down the list to find Network Adapters, where you should find the LAN ethernet device and the 1394 firewire hardware. The 1394 should be listed and working properly as you mentioned. See if the LAN connection also listed there is working, or has a Yellow icon or Red X thru it meaning it is not installed. Depending on what you find, it may be just redetecting the NIC, or letting windows install the network drivers.