Service manual

LC-40D68UT
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Cautions regarding use in high and low temperature environments
• When the unit is used in a low temperature space (e.g. room, office), the picture may leave trails or appear slightly delayed.
This is not a malfunction, and the unit will recover when the temperature returns to normal.
• Do not leave the unit in a hot or cold location. Also, do not leave the unit in a location exposed to direct sunlight or near a
heater, as this may cause the cabinet to deform and the Liquid Crystal panel to malfunction.
Storage temperature: -4°F to +140°F (-20°C to +60°C)
Troubleshooting - Error Message
Problem Possible Solution
• No picture • Is connection to other components correct?
• Is correct input signal source selected after connection?
• Is the correct input selected?
• Is “On” selected in “Audio Only”?
• If the PC image is not displayed, check the following:
- When connecting a laptop PC to the TV, check that display output mode of the
PC is set to external monitor.
- Check the resolution setting on the PC. Is a non-compatible signal being input?
• Picture quality of HD programs is
poor.
• To enjoy HD images from external equipment, you are required to set up HDMI
connection or component connection.
•
If the program content is not of HD quality, HD images cannot be displayed. Check
that the program you are viewing provides HD images.
•
The HD cable/satellite set-top box may need to be configured to output HD images
via cable/satellite.
• The cable/satellite broadcast may not support a signal resolution of 1080p.
• The TV sometimes makes a
cracking sound.
• This is not a malfunction. This happens when the cabinet slightly expands and
contracts according to change in temperature. This does not affect the TV's
performance.
Appendix
The example of an error message
displayed on a screen
Possible Solution
Failed to receive broadcast.• Check the antenna cable. Check that the antenna is correctly setup.•
No broadcast now.• Check the broadcast time in the program guide.•