Changhong Electric LT1712E Manuel d'utilisateur télécharger pdf (Page 20)

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20

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TROUBLESHOOTING

Before calling a technician, please check the following table to see if the below

mentioned symptoms can be diagnosed and fixed.

Symptoms Possible Causes Solution

No picture, no sound,

and no indicator light

on

1.The power cord is not

plugged in

2.The power is off

1.Plug the power cord in

2.Turn the power on

No picture, no sound,

but the green light

indicator

Functions of ON/OFF

TIME and SLEEP have

been set

Press【 a 】to turn on the TV

No picture, no sound,

but the yellow light

indicator

1.PC is in VGA Mode

without any PC signal

input

2.The signal cord is not

connected properly

1.Press 【】or input the PC

signal

2.Connect the signal cord

properly

Picture and sound

with abnormality

1.Contrast, sharpness, and

color are not set properly

2.Color system is not set

properly

3.Sound system is not set

properly

1.Adjust the value of Contrast,

sharpness, and color

2.Set the Color system to the

country broadcasting

standard

3.Set the Sound system to the

country broadcasting

standard

Picture is fuzzy or

with interference

Signal source is weak or

RF cable is faulty

Use a stronger signal or change

a new RF cable

Blue background

No Video signal or the

signal cord is not properly

or not connected

Connect the signal cord

properly

Picture is unclear,

crawls or have black

stripes on horizontal

position in PC mode

Picture is not well adjusted

Adjust automatically by

selecting Auto Adjust or

alternatively adjust Clock and

Phase manually via PC Setting

menu

PC Picture is not in

the middle of the

screen

Picture is not well adjusted

Adjust pictures automatically by

resetting H Position, V Position,

Phase and Clock

No sound

No Audio signal or the

signal cord is not properly

or not connected

1.Connect the audio signal cord

correctly

2.Set the sound system

correctly

The remote control

does not work

Batteries are not correctly

installed or are flat

1.Make sure the positive and

the negative polarities are

correct

2.Reattach the battery lid

3.Replace with new batteries

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