This was made by me. and tested through 640X480 to 1600X1200 no problem was found by me. But if any, tell me or change the horizontal frequency with your own risk.
In manual, HP said, horizontal Freq. is varied from 30khz to 107 kHz, But in that case, I could not set the vertical frequency 85Hz, So I Increased H.F. to 113kHz and found no problem.