LG 31mu97, Owner'S Manual

ENGLISH

33

TRoUblesHooTInG

TRoUblesHooTInG

nothing is displayed on the screen.

Is the monitor's power cord 
plugged in?

y

Check if the power cord is correctly plugged into the power outlet.

Is the power LED on?

y

Check the power cable connection and press the power button. 

Is the power on and the power 
LED displaying white?

y

Check that the connected input is enabled (Menu - Input).

Is the power LED blinking?

y

If the monitor is in sleep mode, move the mouse, or press any key 

on the keyboard, to switch the display on.

y

Check if the computer is turned on.

Is the 

oUT of RanGe

 mes-

sage being displayed?

y

This occurs when signals transferred from the PC (graphics card) 

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.

Is the 

no signal

 message be-

ing displayed?

y

This is displayed when the signal cable between the PC and the 

monitor is missing or disconnected. Check the cable and reconnect 

it.

The osD lock message is being displayed.

Are some functions not avail-

able when you press the Menu 

button?

y

The OSD is locked. Go to 

Menu > settings

 and set 

osD lock

 to 

off

.

The screen retains an image.

Does image sticking occur even 

when the monitor is turned off?

y

Displaying a still image for a prolonged time may cause damage to 

the screen, resulting in the retention of the image.

y

To extend the lifetime of the monitor, use a screensaver.

screen display is unstable and shaky / Images displayed on the monitor leave shadow trails.

Did you select the appropriate 

resolution?

y

If the selected resolution is HDMI 1080i 60/50 Hz (interlaced), the 

screen may be flickering. Change the resolution to 1080P or the 

recommended resolution.

y

Vertical frequency

: In order to display an image, the screen must be refreshed dozens of times per 

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.

y

Horizontal frequency

: The time it takes to display one horizontal line is called the horizontal cycle. If 

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.

noTe