Troubleshooting - Sharp LC-55LE643U Mode D'emploi

Appendix

Troubleshooting

The TV displays "No Signal."
• Press INPUT on the remote control to select a different input source.
• If you are using cable TV, satellite, or an antenna connected directly to the TV, scan for channels. See "Auto
Channel Scan" on page 24.
There is no power.
• Ensure the TV is plugged into a working electrical outlet.
• Ensure the power cable is securely attached to the TV.
• Press POWER on the remote or on the side of the TV to turn the TV on. The power is on, but there is no
image on the screen.
• Ensure all cables are securely attached to the TV.
• Ensure all devices are connected correctly. Devices differ; see your device's user manual for details.
• Adjust Brightness, Contrast, or Backlight. See "Picture menu" on page 20.
• Press INPUT on the remote to select a different input source.
There is no sound.
• Press VOLk on the remote control unit.
• Press MUTE on the remote to ensure mute is off.
• Check the audio settings. See "Audio menu" on page 21.
• Ensure the speakers are set to On. See "TV Speakers" on page 21.
• Ensure no headphones are connected to the TV.
• Check the audio connections of external devices (Blu-ray player, game console, cable/satellite box) that are
connected to the TV.
• If you are using an antenna, the signal strength of the channel may be low. Ensure your antenna is
connected securely to the TV and move the antenna around the room or close to a window for the best
signal.
The colors on the TV don't look right.
• Adjust the Color and Tint settings in the Picture menu. See "Picture menu" on page 20.
• Reset the picture settings. See "Advanced Picture Settings" on page 21.
• Check all cables to ensure they are securely attached. The buttons on the remote aren't working.
• Ensure you are only pressing one button at a time.
• Point the remote directly at the TV when pressing a button.
• Replace the remote batteries with new ones. See "Installing Batteries in the Remote Control Unit" on page
6.
The image quality is not good.
• For the best image quality, view high-definition programs using digital sources. Connect your devices with
HDMI cables.
• If you are using an antenna, the signal strength of the channel may be low. Ensure your antenna is
connected securely to the TV and move the antenna around the room or close to a window for the best
signal.
The picture is distorted.
• Nearby electrical devices may be interfering with the TV. Move the TV away from electrical appliances, cars,
and fluorescent lights.
• Ensure all cables are securely attached.
The display image does not cover the entire screen.
• Set the TV image mode so that the picture fills the screen. Press VIEW MODE on the remote control unit
and select the appropriate aspect ratio.
The TV has pixels (dots) that are always dark or always lit.
• Your HDTV is precision-manufactured using an extremely high level of technology. However, sometimes
pixels may not display correctly. These types of occurrences are inherent to this type of product and do not
constitute a defective product.
I see "noise" or static on the screen.
• When your TV's digital capabilities exceed a digital broadcast signal, the signal is up-converted (improved) to
match your TV's display capabilities. This up-converting can sometimes cause irregularities in the image.
• If you are using an antenna, the signal strength of the channel may be low. Ensure your antenna is
connected securely to the TV and move the antenna around the room or close to a window for the best
signal.
When I change input source, the volume changes.
• The TV remembers the volume level on each input source. If the volume level on the new input source is
higher or lower than the level on the source you switch from, the difference may be noticeable.
• Use VOLk/l on the remote control unit to adjust the volume.
When I change input source, the display image changes size.
• The TV remembers the viewing mode on each input source. If the viewing mode on the new input source
differs from the one on the input source you switch from, the difference may be noticeable.
• See"VIEW MODE" on page 17.
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