Alan-
If you are familiar with tv's you know that the horiz output circuit is
designed to be resonant at 16750 hz. In a computer monitor, to get the
different resolutions, the scan frequencies must be variable. The horiz
output ckt is designed to be resonant at different frequencies. Those
frequencies are usually programmed into the monitor. If you attempt to set
the monitor to a resolution that requires the horiz to operate at a
frequency that it is not programmed for the horiz will not sync and will
usually burn out the HOT ckt if you attempt to force the monitor to operate
at an unprogrammed frequency. In many monitors only the resolutions that the
monitor can safely operate at will appear on the resolution list. Suggest
you try other resolutions and see if it will sync. If it does, that usually
means it is not designed to operate at the resolution you were attempting.
If you are getting a narrow picture, suggest you try adjusting the horiz
screen size in set-up.If you can't get a full width scan I would suspect a
weak horiz/high voltage ckt in the monitor. Also, use the manufacturers
drivers for that monitor which will include only the resolutions the monitor
can operate at.

Hope this helps-
John Dinges



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