I did a fresh install of RH9 on an old PIII machine I have. Everything goes ok until it trys to boot for the first time after the install.
The video card I'm using is an old Diamond Multimedia Stealth 64.
I get the following error messages on the screen:

Can't start the X Server
Would you like to view X Server output to diagnose?

Log file: "/var/log/XFree.86.0.log",
Using config file: "/etc/X11/XF86Config"

(WW)Warning: S3: No matching device section for instance (BusID PCI:0:9:0)Found

(From here it looks like it searches all of the PCI slots because there are numerous entries with just the BusId changed.)

Fatal Server Error:
No Screens Found

ddcproibe returned bogus values
Name: None
ID: None
Hsync: None
Vsync: None

I have tried running XFree86 -configure, but the screen justs goes blank.

Thanks for any help!

do 'XF86Config' Without the quote marks, try VESA, and also try S3 Generic Drivers As Diamond Video Cards Are Built On The Same Tech I Guess...

I did try XF86Config. It returns the same error messages as before. How do I try VESA and S3 Generic?

I did run ddcprobe and my card was returned correct, however the monitor shows as no screen. It was detected along with the video card right during the install process.

ok, for your sake i'll give you every instruction i've followed, my video card is an S3 Savage4 so i use VESA at the moment:
<---START--->
xf86config
<ENTER>
Now you choose a mouse! i chose 9. <ENTER>
y
for the next one just press <ENTER>
Keyboard- i chose 1 <ENTER>
same goes for language!
for the next two press ENTER and NO.
now to start monitor, press ENTER
Select: 10 <ENTER>
Select: 4 <ENTER>
Press enter for the identifier bit
for "DO YOU WANT TO LOOK AT THE CARD DATABASE?" Press Y <ENTER>
now Select/Type 0 for VESA (if it doesn't work then select 375 for S3 Generic)
<ENTER>
Now Press Enter, Now For Video Memory, Specify It Yourself...
Press ENTER for the identifier, now, leave the video modes as they are, and press 4 <ENTER>
choose 4 for colours to be safe, and press ENTER
now, press Y for writing the file...
...tell me how it goes...

<---END--->
!

This method just returns a blank screen for me. For $25 I replaced the video card and everything seems to boot up correctly.
Thanks for your help.

no problem!