Troubleshooting

If a problem occurs when you are using the TV, check the below troubleshooting guide before calling for repair.

Severe noise or snow

Page

Check the aerial cable and TV connections .

P. 4

Check the direction of the aerial.

P. 4

Check the aerial or its cable damaged or not.

--

Patterns, stripes or noise

 

Interference caused by devices such as an amplifier, personal computer,

--

or a hair drier, Move it away from TV.

 

Ghosting (Doubling of images)

 

Interference occurs caused by signal reflection from mountains or

--

building. Try to adjust the aerial’s direction or use another antenna.

 

Cannot turn it on

 

Ensure the power cord is connected to the AC outlet correctly.

--

Cannot operate the remote control.

 

The batteries may be exhausted. Replace with new batteries.

--

Ensure that you are operation the remote control at less than 7 meters

 

from the front of your TV.

 

Remote control stops working

 

Unplug TV, several minutes later plug it in again.

--

Side control buttons do not work

 

Switch "Child Lock" to "Off".

P. 15

Aspect ratio changed unintentionally

 

Press " ZOOM " button to return to your settings.

P. 11

PC screen alignment is off

 

Adjust the "PC Position" in "PC Setting" of Set Up menu.

P. 20

Blue screen appears on the screen

 

Switch "Blue Back" to "Off".

P. 15

Strange picture when using an external device

 

If the top of the image is distorted, check the video signal quality itself.

--

If movement appears unnatural when receiving a signal from a DVD

--

player, etc. with 625p (progressive-scanning), change the output setting

 

of the external device to 625i (interlace-scanning).

 

 

 

Icon does not appear on the screen when plug USB or SD card into the TV.

 

Make sure the USB or SD card inserted engaged.

 

Set input signal (See page 16 Article 2)

 

USB or SD card may be damaged.

 

 

 

Poor picture quality

 

Page

Unnatural colour >> Adjust "Colour" and "Backlight"

P. 10

Check "Colour System". If "Auto" is selected

P. 11

select the specific colour system manually.

 

Noise >> Set to the following functions.

 

Picture Mode : Standard

P. 10

DigiPure

: On

P. 11

Dull picture >> Set to the following functions.

 

Picture Mode : Bright

P. 10

DigiPure

: On

P. 11

Poor sound

 

 

Adjust the "Bass" and "Treble".

P. 12

If receiving a poor signal in "Stereo/III" switch to "Mono".

P. 12

Adjust the channel reception using "Manual".

P. 7

For HDMI signal, wrong screen size in 480p (525p).

 

Switch "Size" in "HDMI Setting" to "1" or "2".

P. 20

For HDMI signal, green and distorted screen

 

Wait a little for the signal to stabilize when switching the signal format

--

for an "HDMI" device.

 

 

For HDMI signal, No picture / No sound

 

Use the cable marked with HDMI logo.

P. 5

Check if the device is compliant with HDMI.

P. 20

Switch "Audio" in "HDMI Setting" to "Digital" or "Auto" for HDMI devices,

 

or "Analogue" or "Auto" for DVI devices.

 

Some functions do not work.

 

It is not a malfunction. Some functions (dark background) in the menu

--

do not work depending on the situation.

 

Black or white dots appear on the screen.

 

LCD panels use fine dots ("pixels") to display images. While more than

--

99.99% of these pixels function properly, a very small number of pixels

 

may not light, or may light all the time. It is not a malfunction.

 

No picture, No sound

 

 

Some input do not output from OUT terminal.

--

Subwoofer, No sound

 

 

May be signal source is not low frequency bass signal.

--

Check subwoofer cable connected correctly.

 

Feedback sound symptoms

 

Keep the microphone away from the TV’s speakers.

--

Echo

 

 

Lower the sound level in "Microphone Volume" in order to prevent the echo.

--

 

 

 

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JVC GGT0359-001A-H, LT-42Z10 manual Troubleshooting, Severe noise or snow