Troubleshooting - LG 31MU97 Owner's Manual

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nothing is displayed on the screen.
Is the monitor's power cord
plugged in?
Is the power LED on?
Is the power on and the power
LED displaying white?
Is the power LED blinking?
Is the oUT of RanGe
message being displayed?
Is the no signal message
being displayed?
Is video or audio breaking up
when in high resolution?
The osD lock message is being displayed.
Are some functions not avail-
able when you press the Menu
button?
The screen retains an image.
Does image sticking occur even
when the monitor is turned off?
screen display is unstable and shaky / Images displayed on the monitor leave shadow trails.
Did you select the appropriate
resolution?
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. If
y
1 is divided by the horizontal interval, the result is the number of horizontal lines displayed per second.
This is called horizontal frequency and is represented by kHz.
Check if the power cord is correctly plugged into the power outlet.
y
Check the power cable connection and press the power button.
y
Check that the connected input is enabled (Menu - Input).
y
If the monitor is in sleep mode, move the mouse, or press any key
y
on the keyboard, to switch the display on.
Check if the computer is turned on.
y
This occurs when signals transferred from the PC (graphics card)
y
are out of the horizontal or vertical frequency range of the monitor.
Please see the Product specification section of this manual to set
the appropriate frequency.
This is displayed when the signal cable between the PC and the
y
monitor is missing or disconnected. Check the cable and reconnect
it.
This occurs with high-resolution signals from some graphics cards.
y
Go to Menu > settings and enable the DisplayPort eQ feature.
The OSD is locked. Go to Menu > settings and set osD lock to
y
off.
Displaying a still image for a prolonged time may cause damage to
y
the screen, resulting in the retention of the image.
To extend the lifetime of the monitor, use a screensaver.
y
If the selected resolution is HDMI 1080i 60/50 Hz (interlaced), the
y
screen may be flickering. Change the resolution to 1080p or the
recommended resolution.
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