Troubleshooting - LG D2500N Owner's Manual

TROUBLESHOOTING

Check the following before calling for service.
No image appears
Is the power cord of the display
connected?
Is the power indicator light on?
Is the power indicator flickering?
Do you see an "OUT OF RANGE"
message on the screen?
Do you see a "CHECK SIGNAL
CABLE" message on the screen?
Do you see a "OSD LOCKED" message on the screen?
Do you see "OSD LOCKED" when
you push MENU button?
The screen retains an image.
Does image sticking occur even
when the monitor is turned off?
The ORIGINAL RATIO menu cannot be enabled.
Did you select a resolution lower
than the screen resolution ratio?
NOTE
Vertical Frequency: In order to display an image, the screen must be refreshed dozens of times per
y
second like a fluorescent lamp. The number of times the screen is refreshed per second is called
vertical frequency or refresh rate and is represented by Hz.
Horizontal Frequency: The time it takes to display one horizontal line is called the horizontal cycle.
y
The number of horizontal lines displayed in one second can be calculated by dividing one by the
horizontal cycle. This is called horizontal frequency and is represented by kHz.
Check Control Panel ► Display ► Settings and see if the frequency or the resolution were
y
changed. If yes, readjust the video card to the recommend resolution.
If the recommended resolution (optimal resolution) is not selected, letters may be blurred and the
y
screen may be dimmed, truncated or biased. Make sure to select the recommend resolution.
The configuration procedure may differ depending on your computer and/or operating system. Also,
y
some video cards may not support certain resolutions. If this is the case, contact the computer or
video card manufacturer for assistance.
y Check and see if the power cord is connected properly to the power outlet.
y Press the Power button.
y If the display is in power saving mode, try moving the mouse or pressing any
key on the keyboard to bring up the screen.
y Try to turn on the PC.
y This message appears when the signal from the PC (video card) is out of
horizontal or vertical frequency range of the display. See the 'Specifications'
section of this manual and configure your display again.
y This message appears when the signal cable between your PC and your
display is not connected. Check the signal cable and try again.
y You can secure the current control settings, so that they cannot be
inadvertently changed. You can unlock the OSD controls at any time
by pushing the MENU button for several seconds: the message "OSD
UNLOCKED" will appear.
y Displaying a still image for a prolonged time may cause damage to the screen,
resulting in the retention of the image.
y Use a screen saver to protect the screen when using the monitor for a
prolonged period of time.
y Adjust the scaling in the graphic card options.
y Scaling settings vary depending on the graphics card or operating system.
Contact the graphics card manufacturer for more information.
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TROUBLESHOOTING