XOCECO LC15YS031, Service Manual

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Unable to switch the power on Check to see if the power plug has been inserted
properly into the socket.
No picture and sound 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
source and the liquid crystal TV set is correct.
Deterioration of color phase or color
tone Check if all the picture setups have been corrected.
Screen position or size is not proper Check is the screen position and size is correctly set
up.
Picture is twisted and deformed Check to see if the picture-frame ratio is properly set
up.
Picture color changed or colorless Check the “Component” or “RGB” settings of the
liquid crystal TV set and make proper adjustment
according to the signal types.
Picture too bright and there is
distortion in the brightest area Check if the contrast setting is too high.
Possibly the output quality of DVD broadcaster is set
too high.
It maybe also due to improper terminal connection of
the video signal in a certain position of the system.
Picture is whitish or too bright in the
darkest area of the picture Check if the setting for the brightness is too high
Possibly the brightness grade of DVD player
(broadcaster) is set too high.
No picture or signal produced from the
displayer if “XXX in search” appears. Check if the cable is disconnected.
Check if it’s connected to the proper terminal or if the
input mode is correct.
There appears an indication - “outside
the receivable scope) Check if the TV set can receive input signal. The
signal is not correctly identified and VGA format is
beyond the specified scope.
Remote control cannot work properly Check if the batteries are installed in the reverse
order.
Check if the battery is effective.
Check the distance or angle from the monitor.
Check if there is any obstruct between the remote
control and the TV set.
Check if the remote control signal- receiving window
is exposed to strong fluorescence.
No picture and sound, but only hash. Check if the antenna cable is correctly connected, or
if it has received the video signal correctly.