Sharp LC-90LE757RU, LC-70LE747KN, LC-70LE747EN, LC-70LE747RU Appendix, Troubleshooting

Appendix

Troubleshooting

Problem	Possible solution
• No power.	• Is the AC cord disconnected?
	• Check if you pressed a on the TV.
• The TV cannot be	• External influences such as lightning, static electricity, etc.,
operated.	may cause improper operation. In this case, operate the TV
	after first turning off the power, or unplugging the AC cord
	and re-plugging it in after one or two minutes.
• Remote control unit	• Are batteries inserted with polarity (e, f) aligned?
does not operate.	• Are batteries worn out? (Replace with new batteries.)
	• Are you using it under strong or fluorescent lighting?
	• Is a fluorescent light illuminating to the remote control
	sensor?
• Picture is cut off.	• Is the image position correct?
	• Are screen mode adjustments (Wide mode) such as picture
	size made correctly? (Pages 46, 58 and 59)
• Strange colour,	• Adjust the picture tone.
light colour, or dark	• Is the room too bright? The picture may look dark in a room
colour, or colour	that is too bright.
misalignment.	• Check the “Colour system” setting (Pages 43 and 48).
• Power is suddenly	• The TV’s internal temperature has increased. Remove any
turned off.	objects blocking the vent or clean.
	• Is the “Sleep timer” set? Select “Off” from the “Sleep timer”
	menu (Page 40).
	• Is “No signal off” or “No operation off” activated? (Page 40)
• No picture.	• Are connections to external equipment correct?
	(Pages 27_32)
	• Is the input signal type selected correctly after connection?
	(Page 47)
	• Is the correct input source selected? (Page 19)
	• Is a non-compatible signal being input? (Page 61)
	• Is the picture adjustment correct? (Pages 36_38)
	• Is the antenna connected properly? (Page 10)
	• Refer to “Picture / Audio test” (Page 80).

• No sound.	• Is the volume too low?
	• If you do not clearly hear the sound for the visually impaired,
	go to “TV Menu” > “Setup” > “Audio” > “Audio description
	setting” > “Mix level”, and select the upper level to turn up
	the volume.
	• Make sure that headphones are not connected.
	• Check if you pressed e on the remote control unit.
	• Is the proper item selected in the “Audio select” menu
	when connecting devices to the HDMI 2 terminal or the PC
	terminal? (Pages 28, 30 and 47)
	• Refer to “Picture / Audio test” (Page 80).
• The TV sometimes	• This is not a malfunction. This happens when the cabinet
makes a cracking	slightly expands and contracts according to changes in
sound.	temperature. This does not affect the TV’s performance.
• Net TV start page	• Is the ETHERNET cable connected correctly? (Page 64)
cannot be displayed.	• Check the settings of “Network setup” (Pages 64–65).
• Some Internet	• The TV has only limited functions compared with regular PC
functions used on a	browsers (Page 66).
PC are not available
from the TV.

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