This is probably from the WiFi card.
1) If you can boot a "LiveCD" get hardware information via the commands (as root):
Which lists information on the PCI cards and the USB (Lots of notebooks have USB WiFi cards).
Can you turn it off and use a cat-5 cable when attempting to install.
I have seen where the LiveCD from Fedora may include packages that are not on the install dvd suc has for Fedora 9. My IBM Thinkpad R60 has the "Intel Corporation PRO/Wireless 3945ABG" WiFi card and it was non-functional after the install but worked when I used the liveCD for it.
Normally when I have new hardware, I boot a "liveCD" or a "LiveDVD" and get the hardware information dumped to a flash drive. Then using an exiting Linux/Solaris machine, I check for
problems related to the hardware (via the special Linux google search,
http://www.google.com/linux ).