[CentOS] compaq r4000

I am trying to install x86_64 on a compaq r4000 laptop.
booting the CD I have tried text mode only and graphicaly mode.
I see the normal stuff flying by and I just get a black screen (in text 
for graphic install).

I have tried linux acpi=off apci=off nousb nopcmcia
linux noprobe

all result in the same black screen. Once the screen goes black the CD 
is still
being accessed but the screen is just black.

I have tried CTRL-ALT-F1 or F2 and still nothing. CTL-ALT-DEL does 
reboot the
machine.

Anyone seen this? any ideas?

the machine is compaq r4000, turian 64 bit cpu. ATI video. windows on 
the same machine
works fine.

jerry