18 Series LCD TV

TROUBLESHOOTING

Before calling a technician, please check the following items to see if the below mentioned symptoms can be diagnosed and fixed.

Symptoms

Possible Reasons

 

Correction

 

No picture, no

1.The power cord is not plugged in

1.Plug the power cord in

 

sound, and no

 

2.The power is off

2.Turn the power on

 

indicator light on

 

 

 

 

 

No picture, no

1.Contrast, sharpness, color and

 

 

 

volume are all in the minimum value

1.Alter the value of contrast,

sound, but the

or TV is in mute mode

sharpness, color and volume

 

green light

2.PC has no signal in PC mode

2.Press any button or input PC signal

indicator

3.The signal cord is not correctly

3.Connect the signal cord correctly

 

connected

 

 

 

 

1.Contrast, sharpness, and color are

1.Adjust the value of Contrast,

Picture and sound

sharpness, and color

 

set improperly

2.Set the Color system to the country

with abnormity

2.Color system is set improperly

broadcasting standard

 

 

3.Sound system is set improperly

3.Set the Sound system to the country

 

 

broadcasting standard

 

Picture is spotted

Signal source is low-grade or the signal

Use the qualified signal cord

 

or with snow

cord is in a lower quality

 

 

 

 

Blue background

No Video signal or the signal cord is

Connect the signal cord properly

 

in AV mode

improperly/not connected

 

 

 

 

 

 

 

 

 

Picture is unclear,

 

 

 

 

or moves or have

 

Adjust automatically by selecting Auto

black stripes on

 

Adjust or adjust ClockPhaseH

horizontal position

Picture is not well adjusted

Position V

Position manually

after

in PC mode

 

entering into the PC Setting menu to

 

 

 

 

solve this problem

 

PC Picture is not in

 

 

 

 

 

 

the middle of the

 

 

 

 

screen

 

 

 

 

 

 

 

 

 

 

No Audio signal or the signal cord is

1.Connect

the audio signal

cord

No sound

properly

 

 

improperly/not connected

 

 

 

2.Set the sound system properly

 

 

 

 

 

 

1.Make sure the positive and the

 

 

negative polarities are correct.

 

The remote control

Batteries are improperly installed or

2.Check if there is a loose contact

does not work

exhausted

between the batteries and the

 

 

springs

 

 

 

 

3.Replace the batteries

 

Colors of PC

The user made the wrong Color Temp

 

 

 

Picture on display

Readjust the Color Temperature

 

adjustment

 

are improper

 

 

 

 

 

 

 

 

 

 

 

 

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Changhong Electric LT2618, LT3218, LT3718, LT4018 manual Troubleshooting