I have had this issue with FC 6,7 and now 8, probably 9 when it is released. I have combed this forum and lost of post for this issue but no definite answer that works.
I have a FC 8 DVD, "vesa linux" install does nothing, although this work with older Fedora
text install does not work.
pluggin in a display on the laptop connector does nothing, I see no display at boot time.
Wtf is going on with this ATE Radeon x700 and Fedora installation???