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TROUBLESHOOTING
Problem Check item Pages
No image on screen, and
no sound from speakers.
• Make sure that the AC power cord plug is securely
inserted in AC power outlet and AC adapter.
• Make sure that the AC adapter’s DC output is securely
connected to main unit’s DC input terminal.
• Make sure that the main power switch of the main unit is
on.
• Make sure that the AV input is properly set.
• Make sure that the cables are correctly connected to
rear terminal section of LCD monitor.
• Check to see if the batteries in the remote control have
sufficient power.
• Make sure that the unit is not in the standby mode
(power indicator is red).
Speakers produce sound,
but no image on screen.
• Make sure that the cables are correctly connected.
• Make sure that AV1 is set to COMPONENT to view
the image from component sources.
Image is too light or
improperly tinted.
• Check COLOR and TINT adjustments. (NTSC ONLY)
• Check CONTRAST and BLACK LEVEL adjustments.
• Check RED-BLUE adjustments.
• Make sure that the DVD connection cord is correctly
connected to the COMPONENT terminal.
Image is displayed, but no
sound from speakers.
• Make sure that the cables are properly connected to
rear terminal section of LCD monitor.
• Check the volume adjustment.
• Make sure that the sound is not muted.
• Make sure that the headphones are not connected.
Image is too dark.
• Check to see if BRIGHTNESS is set to DARK.
• Check CONTRAST and BLACK LEVEL adjustments.
• Lamp may have reached the end of its life. (Contact
an authorized Sharp service facility for replacement
lamp(s).)
No colors on image.
• Check COLOR adjustment.
• Check the color system setting.
• Make sure that the DVD connection cord is correctly
connected to P
B and PR of the COMPONENT terminal.
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17
• Check to see if the batteries in the remote control
have sufficient power.
• Make sure that (+) and (–) side of batteries are
properly positioned in remote control.
• Make sure that the remote sensor window is not
under strong fluorescent lighting.
Remote control does not work.
8
17
17
8
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LC-20M4U(20-28)Eng.p65 01.11.13, 1:08 PM24