Samsung SyncMaster 400DXn Owner's Manual page 158

The LCD Display screen flickers.
Problems related to the Screen
Note
• Problems related to the LCD Display screen and their solutions are listed.
Problems
The screen is blank and the power
indicator is off.
"Check Signal Cable" message.
"Not Optimum Mode " message.
The picture rolls vertically.
The image is not clear; picture is
blurred.
The picture image is unstable and
shakes.
Ghost images are shown in the
picture.
The image is too light or too dark.
The screen color is inconsistent.
The color image is distorted by
dark shadows.
The color white is poor.
The power Indicator blinks green.
The screen is blank and the power
indicator light is steady green or
blinks every 0.5 or 1 seconds.
The screen is blank and it is
blinking.
Problems related to Audio
Note
Display is securely connected.
(Refer to Connecting a Computer)
Solutions
Ensure that the power cord is firmly connected and the LCD
LCD Display is on.
(Refer to the Connecting the LCD Display
Ensure that the signal cable is firmly connected to the PC or
video sources.
(Refer to the Connecting the LCD Display
Ensure that the PC or video sources are turned on.
Check the maximum resolution and the frequency of the video
Adaptor.
Compare these values with the data in the
Chart.
Check if the signal cable is securely connected.
Re-connect it, if necessary.
(Refer to Connecting a Computer)
Run Frequency Coarse and Fine
Turn on again after removing all accessories
(video extension cable, etc.)
Set the resolution and frequency to the recommended ranges.
Check if the resolution and frequency set for the computer video
card falls in the range supported by the LCD Display.
If not, reset them referring to the current
LCD Display menu and Preset Timing
Adjusts the brightness and contrast.
(Refer to the Brightness, Contrast)
Adjust color using Custom under OSD Color Adjustment menu.
The LCD Display is currently saving the changes made to the
settings to the OSD memory.
The LCD Display is using its power management system.
Press a key on the keyboard.
If you see the "TEST GOOD" message on the screen when you
pressing the MENU button, check the cable connection between
the LCD Display and the computer to ensure that the connector
is properly connected.
)
)
Preset Timing Modes
tuning.
Information under the
Modes.