After my successful installation of FC6 on my DELL desktop, I boot FC 6 for the first time. And it then stopped informing me that the refresh frequence is out of range, with a horizontal rate of 92.5kHz. I don't know why the rate so high. Nevertheless, I restart in "linux rescue" mode, editing the /etc/X11/xorg.conf file, appending a Section like this:
Section "Monitor"
Identifier "Monitor0"
ModelName "Monitor0 Model"
HorizSync 30.0 - 50.0
VertRefresh 50.0 - 70.0
EndSection
and Save&Quit&restart , while the problem remains.
Is there anyone can help me?THX a lot

Remove or comment out the HorizSync and VertRefresh lines from the xorg.conf file, example;

I also edited the two lines to provide better refresh rates based on your supplied information (horizontal rate of 92.5kHz) just in case.

.

Thank you for your help, I'll try as you suggest tomorrow. That problem occurs on my Dell Computer in my office. I can install FC6 perfectly well on my own computer with the same disk without any problem.

I have already solved the problem by adding the line below:
Modes "1024x768"
for FC6 on Dell desktop computer, the xorg.conf initially generated is always incomplete. After I adding that line to the file, it did work.
thank you

The Horizintal and vertical frequencies are supposed those operated by your monitor. You cannot just use a setting from another PC user.

Normally every monitor supplied with the data information of its scanning frequency range. A CRT monitor scans at much higher frequencies than a LCD monitor and so a Linux installer requires the user to correct any mismatch.

If you have the scanning frequencies matched the screen should be central leaving no black border around. Also the color should be top notch.

It is one of those things Linux still requires a user to know and do.