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
Display Mode
Horizontal
Frequency
(kHz)
Vertical
Frequency
(Hz)
Pixel Clock
(MHz)
Sync Polarity
(H/V)
VESA,1600X1200 75.000 60.000 162.000 +/+
IBM,640X350 31.469 70.086 25.175 +/-
IBM,720X400 31.469 70.087 28.322 -/+
IBM,720X400 31.469 59.940 25.175 -/-
VESA,640X480 37.861 72.809 31.500 -/-
VESA,640X480 37.500 75.000 31.500 -/-
MAC,640X480 35.000 66.667 30.240 -/-
MAC,832X624 49.726 74.551 57.284 -/-
VESA,800X600 35.156 56.250 36.000 +/-,+/-
VESA,800X600 37.879 60.317 40.000 +/+
VESA, 800X600 48.077 72.188 50.000 +/+
VESA,800X600 46.875 75.000 49.500 +/+
VESA,1024X768 48.363 60.004 65.000 -/-
VESA,1024X768 56.476 70.069 75.000 -/-
VESA,1024X768 60.023 75.029 78.250 +/+
VESA,1152X864 67.500 75.000 108.00 +/+
MAC,1152X870 68.681 75.062 100.00 -/-
VESA.1280X960 60.000 60.000 108.00 +/+
VESA,1280X1024 79.976 75.025 135.00 +/+
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
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