Changhong Electric LT1512E - Manual (Page 20)

PAGE 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