LG 55lv770s Owners Manual

							131
ENGENGLISH
TROUBLESHOOTING
TROUBLESHOOTING
General
ProblemResolution
Cannot control the TV with the 
remote control.
 y Check the remote control sensor on the product and try again. yCheck if there is any obstacle between the product and the remote contro\
l. yCheck if the batteries are still working and properly installed ( to ,  to ). yCheck if the appropriate input mode such as TV or VCR is set for using the 
remote control.
No image display and no sound is 
produced.
 y Check if the product is turned on. yCheck if the power cord is connected to a wall outlet. yCheck if there is a problem in the wall outlet by connecting other produ\
cts.
Image appears slowly when the TV 
turns on.
 y The image is muted during the product  stat up process. This is normal. If the 
image does not appear in a few minutes, unplug the TV for 30 seconds and try 
again. If the image still does not appear, contact the authorized service  centre 
in your local area.
Cannot connect external devices.
 y Refer to the “Connection overview ” and connect an external device.
The TV turns off suddenly.
 y Check the power control settings. The power supply may be interrupted. yCheck if the Auto sleep feature is activated in the Time settings.  
Refer to the “Sleep Timer”.
 yIf there is no signal while the TV is on, the TV will turn off automatically after 15 
minutes of inactivity.
Audio
Problem Resolution
No sound is produced while images 
are displaying.
 y Press  + or - button. yCheck if the sound is muted by pressing  MUTE. yScroll to other channels. There may a problem with the broadcast. yCheck if the audio cables are connected properly. yCheck if the TV Speaker feature is activated in the menu option.
No output from one of the speakers
 y Adjust Balance  in the menu option .
Unusual sound from inside the TV 
is produced.
 y A change in ambient humidity or temperature may result in an unusual nois\
e 
when the product turns on or off.  There is no problem with your product.
  
						

							132
ENGENGLISH
TROUBLESHOOTING
Video
ProblemResolution
An image displays in black and 
white or the colour  quality is poor.
 yAdjust the colour  setting in the menu option. yKeep a sufficient distance between this product and other electronic products. yScroll to other channels. There may a problem with the broadcast.
Horizontal or vertical bars appears 
or images blur
 y Check if there is local interference  such as an electrical appliance or power 
tool.
Lines or streaks appear on images
 y Check the antenna or  aim the antenna to the correct  direction.
Afterimages (ghosts) appear when 
the product turns off
 y Pixels may have been damaged from a fixed image displayed for a long tim\
e 
(image burn). Use a screen saver to prevent the pixel damage on the sc\
reen.
The power is on but the screen ap -
pears extremely dark.
 y Adjust the brightness and contrast in the menu option.
“No Signal” appears on the screen.
 y Check if the signal cable is connected between the TV and products properly. yCheck the selected input source by pressing  INPUT.
Black spots appear on the screen.
 y Several pixels in red, green, white, or black may appear on the screen t\
hat can 
attribute to the characteristics of the LCD panel.   
This is normal.
The display offset is wrong.
 y Adjust the position setting in the menu option. yCheck if the video card resolution and frequency are supported by the pr\
oduct. 
If the frequency is out of range, set to the recommended resolution usin\
g the 
display settings on the external device.
Thin lines appear in the background 
of the screen.
 y Check the video cable connections.
Horizontal noises appear or charac -
ters blur.
 y Adjust the Phase setting in the menu option.    
Refer to the “SCREEN”.
The reception on some channels 
is poor
 y Scroll to other channels. There may a problem with the broadcast. yThe station signal may be weak.  Aim the antenna to the correct direction. yCheck if there is local interference  such as an electrical appliance or power 
tool.