I recently installed ATI Theater 550 Pro (a TV card) into one of my four available PCI slots (note that none of them were being used prior to installation).
My operating system is Windows XP Service Pack 2.
Upon installation, my internal, factory-installed network card (Realtek RTL8139/810X Family PCI Fast Ethernet) would not access the Internet (normally, the LED light on the network card flashes green to indicate connection; when I instsalled the ATI Theater, there was no light).
I tried right-clicking my Network icon and clicking "Repair", but it could not successfully assign me a new IP address.
I believe there must be some kind of hardware conflict between my network card and my ATI Theater card and would be grateful for any assistance.