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Chapter6: Classical accident maintenance procedures and examples
6-1 The thinking of
don’t boot
The power is not connected.
6-2 Common problems for your reference
To speed you to dignose and solve problems, the following commom problems are offered for your
reference.
Symptoms
Possible Reason
Solutions
No picture, no sound, and no
indicator light on
1.The power cord is not plugged in
2.The power is off
1.Plug in the power cord
2.Turn the power on
abnormity Picture and sound with
1.Contrast, sharpness, and color are set
improperly
2.Color system is improperly
3.Sound system is improperly
1.Adjust the numberical value of
Contrast, sharpness, and color
2.Set the Color system to the country
broadcasting standard
3.Set the Sound system to meet the
country’s broadcasting standard
Picture is spotted or with snow
Signal source is low-grade or the signal
cord is in a lower quality
Use the qualified signal cord
No picture, no sound and indicator
light is green
Contrast, brightness, color and volume are
all in the minimum value or TV is in mute
mode.
Adjust the value of contrast,
brightness, color and volume
The signal cable is not correctly connected.
Connect the signal cable correctly
Blue screen, AV or SVIDEO is
displayed
There is no signal input or the video cable is
not connected or incorrectly connected
Connect the video cable correctly
No sound
There is no audio signal input or audio
cable is not connected correctly
Connect the audio cable correctly
VGA picture display with improper
color
The color temp is adjusted incorrectly by
user
Readjust the color temp, or select
the original color setting
HDMI source, with snow pixel of
full screen
The signal source is not normal
Plug the HDMI cable again
The remote control does not work
Batteries are improperly installed or
exhausted
1. Make sure the positive and the
negative polarities are correct.
2.Check if there is a loose contact
between the batteries and the springs
3.Replace the batteries
