|First, check in the BIOS to see if the onboard NIC is enabled. From the sounds of it, it may not be. If it's not, enable it and then boot to your OS and Windows should "find" the new hardware and then you can install the drivers.|
If it's already enabled and Windows doesnt' see the device you could try installing the drivers for the device manually through the "add hardware" applet in Control Panel.
Also, before I restored the os, I put a pci lan card in but it still would not recognize that there was an internet connection when I would connect it to an active ethernet connection.
This should only be necessary if all the above doesn't work to getting the onboard NIC to work. While troubleshooting the issue, I would remove it. If it turns out the onboard NIC has failed, then and only then would I add it. If the PCI NIC is good, Windows should find it immediately upon booting up after adding the device and ask for the drivers.
You are shutting the PC down completely and unplugging the power before attemping to install any hardware right? You did ground yourself off to the case by holding an arm in contact with the case at all times while working on the inside..........right?
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.