Read Sharp LC-70UQ10KN (serv.man4) User Guide / Operation Manual online
77
Appendix
Troubleshooting
Problem
Possible solution
• No power.
• Is the AC cord disconnected?
• Check if you pressed a on the TV.
• The TV cannot be
operated.
• External influences such as lightning, static electricity, etc.,
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
does not operate.
• Are batteries inserted with polarity (e, f) aligned?
• 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 45, 58 and 59)
• Strange colour,
light colour, or dark
colour, or colour
misalignment.
• Adjust the picture tone.
• Is the room too bright? The picture may look dark in a room
that is too bright.
• Check the “Colour system” setting (Pages 42 and 47).
• Power is suddenly
turned off.
• The TV’s internal temperature has increased. Remove any
objects blocking the vent or clean.
• Is the “Sleep timer” set? Select “Off” from the “Sleep timer”
menu (Page 39).
• Is “No signal off” or “No operation off” activated? (Page 39)
• No picture.
• Are connections to external equipment correct?
(Pages 26_31)
• Is the input signal type selected correctly after connection?
(Page 46)
• Is the correct input source selected? (Page 18)
• Is a non-compatible signal being input? (Page 61)
• Is the picture adjustment correct? (Pages 35_37)
• Is the antenna connected properly? (Page 9)
• Refer to “Picture / Audio test” (Page 79).
• 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, 29 and 46)
• Refer to “Picture / Audio test” (Page 79).
• The TV sometimes
makes a cracking
sound.
• This is not a malfunction. This happens when the cabinet
slightly expands and contracts according to changes in
temperature. This does not affect the TV’s performance.
• Net TV start page
cannot be displayed.
• Is the ETHERNET cable connected correctly? (Page 64)
• Check the settings of “Network setup” (Pages 64–65).
• Some Internet
functions used on a
PC are not available
from the TV.
• The TV has only limited functions compared with regular PC
browsers (Page 66).
• Miracast image/audio
cannot be output to
the TV.
• Check pairing.
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