LG Electronics 31mu97 owner manual Troubleshooting, Nothing is displayed on the screen

34Troubleshooting

TROUBLESHOOTING

ENGLISH
	Is the monitor's power cord	yy Check if the power cord is correctly plugged into the power outlet.
	Nothing is displayed on the screen.
	plugged in?
	Is the power LED on?	yy Check the power cable connection and press the power button.
	Is the power on and the power	yy Check that the connected input is enabled (Menu - Input).
	LED displaying white?
	Is the power LED blinking?	yy If the monitor is in power-saving mode, move the mouse, or press
		any key on the keyboard, to switch the display on.
		yy Check if the computer is turned on.
	Is the OUT OF RANGE mes-	yy This occurs when signals transferred from the PC (video card) are
	sage being displayed?	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-	yy This is displayed when the signal cable between the PC and the
	ing displayed?	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?

yy The OSD is locked. Go to Menu > Settings and set OSD Lock to Off.

The screen retains an image.

Does image sticking occur even	yy Displaying a still image for a prolonged time may cause damage to
when the monitor is turned off?	the screen, resulting in the retention of the image.
	yy 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?

yy 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.

NOTE

yy 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.

yy 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 Hz.