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Trouble shooting
1. Fault clearance
Before servicing please check to find the possible causes of the troubles according to the table
below.
1.1 Antenna (signal):
Picture is out of focus or jumping
Fringe in picture
Picture is interfered by stripe shaped
bright spots
There appear streaks or light color
on the screen
1.2 TV set:
Symptoms
Unable to switch the power on
No picture and sound
Deterioration of color phase or color
tone
Screen position or size is not proper
Picture is twisted and deformed
Picture color changed or colorless
Bad status in signal receiving
Poor signal
Check if there are failures with the electrical connector or
the antenna.
Check if the antenna is properly connected.
Check if the antenna is correctly oriented.
Maybe there is electric wave reflected from hilltop or
building.
Possibly due to interference from automobile, train, high
voltage transmission line, neon lamp etc.
Maybe there is interference between antenna and power
supply line. Please try to separate them in a longer
distance.
Maybe the shielded-layer of signal wire is not connected
properly to the connector.
Check if interfered by other equipment and if interfered
possibly by the equipment like transmitting antenna,
non-professional radio station and cellular phone.
Possible cause
Check to see if the power plug has been inserted properly
into the socket.
Check to see if the power supply of liquid crystal TV has
been switched on. (As can be indicated by the red LED at
the front of the TV set)
See if it's receiving the signal that is transmitted from other
source than the station
Check if it's connected to the wrong terminal or if the input
mode is correct.
Check if the signal cable connection between video
frequency source and the liquid crystal TV set is correct.
Check if all the picture setups have been corrected.
Check is the screen position and size is correctly set up.
Check to see if the picture-frame ratio is properly set up.
Check the "Component" or "RGB" settings of the liquid
crystal TV set and make proper adjustment according to the
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