Panasonic TH-L42U5D Service Manual page 25

Trouble shooting
1. Fault clearance
Before calling your dealer or service center for assistance, check the matters below once again.
(1) Make sure you have connected LCD TV to your equipment as described in the section
" CONNECTING LCD TV".
(2) Check cable connection. Verify that all external equipment and power cord are properly
connected.
(3) Verify that all power is switched on.
(4) If LCD TV still dose not produce an image, re-start the external equipment.
(5) If the image still not appears, unplug LCD TV from the external equipment and check the external
equipment. The problem may be with your graphics controller rather than with LCD TV. (When
you reconnect LCD TV, remember to turn the external equipment and TV off before you power up
LCD TV. Power the equipment back on in order of LCD TV and external equipment.)
(6) If the problem still exists, check the following chart.
Problem Try these Solutions
NO POWER
Remote
Control dose
not work
No image
No sound
There are tiny
black points
and/or bright
point on the TV
Abnormal
color of image
Plug this LCD TV into the AC outlet.
Press POWER button on side control or on Remote Control to turn on LCD TV.
Check POWER Indicator. If this indicator blank, this TV has getting trouble.
Check the batteries.
Make sure nothing is between the Remote Receiver and the Remote Control.
Make sure you are not too far from LCD TV when using Remote Control.
Maximum operating range is 5m.
Is direct sunlight or strong artificial light shining on LCD TV's Infrared Remote
Receiver? Eliminate the light by closing curtains, pointing the light in a different
direction, etc.
Check the connection between the external equipment and LCD TV.
When turning LCD TV on, it takes a few seconds to display the image.
Check the system that you select is corresponding with the external equipment
or the video equipment.
Make sure the temperature is not out of the Operating Temperature (0° C ~
50° C).
Turn off power, then turn on again, re-start LCD TV.
Check Audio cable connection from Audio input source.
Adjust the Sound System.
Press VOLUME (+) button.
Press MUTE button.
Dark or bright points of light (red, green, or blue) may appear on the screen.
This is a characteristic of the LCD panel, not a malfunction of the LCD TV.
LCD panel is produced with very high accuracy technology. There is 99.99% or
more dot pixel, but there is also 0.01 % or less of dot pixel lack or dot pixel that
is constantly lighted. This is not defect.
Regarding LCD panel characteristic, it may occur picture remain (look like a
mirror) when the screen is changed if it displays same screen for a long time.
Changing the picture or turn-off the power supply may recover.
Stripe pattern (more, interference stripes) may show up on the screen depends
on the reflected picture.
Adjust the value of color.
Select different color system.
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