LG Electronics 3377LLBB55DD, 3377LLBB44DD Check the input source, Check the signal cable

APPENDIX

The audio function does not work.

Picture OK & No sound

No output from one

of the speakers

Unusual sound from

inside

the product

■Press the VOL or VOLUME button.

■Sound muted? Press MUTE button.

■Try another channel. The problem may be with the broadcast.

■Are the audio cables installed properly?

■Adjust Balance in menu option.

■A change in ambient humidity or temperature may result in an unusual noise when the product is turned on or off and does not indicate a fault with the product.

APPENDIX

There is a problem in PC mode. (Only PC mode applied)

The signal is out of range	■ Adjust resolution, horizontal frequency, or vertical frequency.
	■ Check the input source.
(Invalid format)
Vertical bar or stripe on
background &	■ Work the Auto configure or adjust clock, phase, or H/V position. (Option)
Horizontal Noise &
Incorrect position
Screen color is unstable	■ Check the signal cable.
or single color	■ Reinstall the PC video card.

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