Using flat-screen monitor with RedHat 9

[Andy Allen <andy allen virgin net>]

I'm trying to use a flat-screen monitor (GNR TG700H) with RedHat 9. On
boot-up it fails at the login screen stage with the message "out of
frequency" - but when I boot into Windows XP it's fine! Is there a
setting I can change to make it work with RH9, or is it a lost cause?

Andy