Troubleshooting – Hitachi L42N03A User Manual
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Before calling service personnel, please check the following troubleshooting guide. If any problem still
persists, unplug the TV set and call for servicing.
Symptom
Check List
No picture, no sound
Check if the main power of the TV is turned on.
Check the connection of the power cord and/or other cables.
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Normal picture, no sound
Check the volume level.
Check if the button has been pressed or not.
Check the connection of the external equipment.
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Poor color or no color, normal sound
Check the value level of “Brightness” and “Contrast” in
PICTURE menu.
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Multiple images, normal sound
Check the antenna connection and direction.
Fine tuning the TV.
Check the connection of the external equipment.
The TV station may have broadcast difficulties. Try another
channel.
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Snowy picture, poor sound
Check the antenna connection and direction.
The TV station may have broadcast difficulties. Try another
channel.
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Intermittent interference
Check if the source of interference is shield well.
Remove those kinds of electrical devices away from the TV.
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Poor stereo sound
The TV station may have broadcast difficulties. Try to change
to mono mode.
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Remote control does not work
Check if the batteries are installed correctly.
The batteries may be exhausted. Replace them with new
ones.
Remove all obstruction between the remote control and the
remote control sensor.
Ensure there is no strong light shinning on the remote
control sensor.
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“No Signal” appears on the screen
The TV cannot detect any signals from any input terminals.
Check if the cable is connected correctly and firmly.
Check if the power of any external equipment is turned on.
Check if the input source selection is correct.
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“Unsupported Signal” appears on the
screen (RGB mode only)
Check if the display resolution and frequency from your PC
is a valid mode for the TV. Refer to the recommended RGB
input signal chart
•
Image not centered (RGB mode only)
Adjust the “H Position” and “V Position” in the SETUP
menu.
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Troubleshooting