Samsung SyncMaster 591S Manual page 70

If the signal transferred from the computer is the same as the following Preset Timing Modes, the
screen will be adjusted automatically. However, if the signal differs, the screen may go blank while
the power LED is on. Refer to the video card manual and adjust the screen as follows.
Table 1. Preset Timing Modes
General
PowerSaver
Display Mode
Preset Timing
Modes
VESA, 640 x 480
VESA, 640 x 480
VESA, 800 x 600
Horizontal Vertical
Frequency Frequency
(kHz) (Hz)
37.500 85.008
43.269 75.000
53.674 85.061
Horizontal Frequency
The time to scan one line connecting the right edge to the left edge of the
screen horizontally is called Horizontal Cycle and the inverse number of
the Horizontal Cycle is called Horizontal Frequency. Unit: kHz
Vertical Frequency
Like a fluorescent lamp, the screen has to repeat the same image many
times per second to display an image to the user. The frequency of this
repetition is called Vertical Frequency or Refresh Rate. Unit: Hz
SyncMaster 591S/591V
Pixel Clock Sync Polarity
(MHz)
36.000
31.500
56.250
(H/V)
-/-
-/-
+/+