I am assuming when you see that message you are not given a command prompt?
So long since I have experienced that, I am guessing you have the frequency set to high for your monitor to handle.
I am not familiar with Suse, but to blindly try to fix it:
When at your boot selector, choose "failsafe" not "Suse", what you want is to boot to a command prompt. Then do this at the command prompt: (su is superuser, so the password to give is root password)
[root@localhost don]# xorgconfig
This program will create a basic xorg.conf file, based on menu selections
you make. It will ask for a pathname when it is ready to write the file.
The xorg.conf file usually resides in /etc/X11 or /usr/X11R6/etc/X11. If
no xorg.conf file is present there, Xorg will probe the system to
autoconfigure itself. You can run Xorg -configure to generate a xorg.conf
file based on the results of autoconfiguration, or let this program
produce a base xorg.conf file for your configuration, and fine-tune it.
A sample xorg.conf file is also supplied with Xorg; it is configured
for a standard VGA card and monitor with 640x480 resolution.
There are also many chipset and card-specific options and settings available,
but this program does not know about these. On some configurations some of
these settings must be specified. Refer to the X driver man pages and the
chipset-specific READMEs in /usr/X11R6/lib/X11/doc for further details.
Before continuing with this program, make sure you know what video card
you have, and preferably also the chipset it uses and the amount of video
memory on your video card, as well as the specifications of your monitor.
Press enter to continue, or ctrl-c to abort.
If you don't know what driver to use, the "vesa" driver should work, and you can change it later in a graphical user interface where you will be more comfortable at moment.
after you are done and changes saved, use the command "halt" (without the quotation marks). Your machine will shut down, and you should be able to boot to a gui. If it boots to comand prompt instead of gui or the out of range message, login as regular user and use "startx" command (without the quotation marks).
Suse may have there own graphic utility, but this one is common to all linux distros.