Changhong Electric JUC7.820.00084054, Maintenance Manual

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9. Please turn on the TV again once the mboot is updated successfully.
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