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Troubleshooting - Hitachi LE42EC04A User Manual

Lcd color television
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TROUBLESHOOTING

Symptom
General
No Power
"No Signal" appears on the screen
Remote control does not work
Power suddenly turns off
Picture / Sound
No Picture, No Sound
No Picture, Normal Sound
Normal Picture, No Sound
Snowy picture, Poor Sound
Intermittent Interference
"No Signal" appears on the screen
Multiple images, normal sound
Poor stereo sound
Screen appears dark
Brightness and color tone on the sides differ
from the center
RGB Mode
"Unsupported Signal" appears on the screen
Image not centred
Blank screen in PC mode
27
Check List
- Check the connection seating at the wall and panel.
- 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.
- Check if the batteries are installed correctly and hold a charge. Replace with new
batteries to verify.
- Remove all obstruction between the remote control and the remote control sensor.
- Ensure there is no strong light shining on the remote control sensor.
- Confirm that the Sleep Timer did not turn off your flat panel TV.
- Check the power control setting.
- Check if the main power of the TV is turned On.
- Check the connection of the power cord and/or other cables.
- Check the antenna connections.
- Check the signal source.
- Check the picture adjustment settings. Reset to default values if necessary.
- Confirm that the connected equipment is installed and programmed propely.
- If viewing an image from a PC, confirm that the signal is compatible.
- The feature "Audio Only" could be activated at any input sources. Press any
remote control button to resume 'Display On'.
- The feature "Background Music" could be activated at Media Player mode. Press
any remote control button to resume 'Display On'.
- Broadcasting failure may happen.
- Press the volume up button to increase volume.
- Change the sound system.
- Broadcasting failure may happen.
- Check the connection of the external equipment.
- Check the antenna connection and direction.
- The TV station may have broadcast difficulties. Try changing to another channel.
- Check if the source of interference is shield well.
- Remove those kinds of electrical devices away from the TV.
- 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.
- Check the antenna connection and direction.
- Fine tune the TV.
- Check the connection of the external equipment.
- The TV station may have broadcast difficulties. try another channel.
- The TV station may have broadcast difficulties. Try to change to Mono mode.
- Check for any obstacles in front of the Ambient Sensor.
- If images in 4:3 mode or letterbox images are displayed for long periods or for
shorter periods over several days, an after-image may remain due to burning. Watch
images in Full screen as much as possible to avoid this issue.
- 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.
- Adjust the "H Position" and "V Position" in the "RGB Mode Setup" menu.
- The TV might not be able to recognize the resolution set by the PC. Suggest to
change to the best resolution or other standard resolutions of Windows system. Set
refresh rate to be 60Hz.

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