60Hz is the horizontal refresh rate, it's fine (tho best to set it higher to avoid screen flicker and tired eyes if you do alot of desktop work), the error is to do with the vertical refresh rate. Go to \My Documents\GTA San Andreas User Files\ and copy/rename/zip the folder - delete the original then try to start the game, you'll lose your save points for the time being but your screen configuration should be back to a basic setting, quit GTA then selectively copy back your old save files until you find the one that holds the screen res information.
It's the 75.2KHz (the bandwidth) that must be out of range. This is afftected by the Refresh rate and the resolution. It looks as if you have the resolution set too high, since you cannot lower the refresh rate from 60Hz.
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