@ExamiganHorizontal scan range 30 - 80 kHz
Vertical scan range 55 - 75 Hz
It does boot up OK and I can see the desktop at least.
If you can see the desktop, either Workbench is using a VGA compatible screenmode, or your monitor can sync lower than its specs seem to imply.
When you have booted to WB, try checking Screenmode Prefs (if you're running a new enough OS version - which one is it, BTW?) and see which screenmode it is using and its frequencies.
Best regards,
Niels