57
9
Technical Information and Help
Hints and Tips
The following table contains various hints and tips to get the best performance from your TV. If you require additional assistance
please call our Call Centre on (UK) 0344 561 1234 or (Ireland) 1 890 818575. Our Customer Contact Centre is open 24/7.
The TV does not operate properly.
The TV does not respond when
pressing any buttons
• The TV may freeze up during use. Switch the TV off at the mains for a few minutes.
Switch on again and try to operate it again as usual.
TV cannot be switched on
• Check that the TV is connected to the mains supply and switched on.
• Make sure all connected AV devices are switched off before switching on your TV.
The remote control does not work
• Check to see if there are any objects between the TV and the remote control
causing an obstruction. Ensure that you are pointing the remote control directly at
the TV.
• Ensure that the batteries are installed with the correct polarity (+ to +, - to -).
• Install new batteries.
Power is suddenly turned off
• Check the TV has power to it. The mains supply maybe interrupted.
• Check if the sleep timer is set.
• Check whether the Auto Standby is activated.
The video function does not work.
No Picture & No Sound
• Check whether the TV is switched on.
• Try another channel. The problem may be caused by the broadcaster.
Picture appears slowly after
switching on
• This is normal, the image is muted during the TV startup process. Please contact
your service centre, if the picture has not appeared after five minutes.
No or poor colour or poor picture
• Adjust the settings in the PICTURE menu.
• Try another channel. The problem may be caused by the broadcaster.
• Check if the video cables are connected properly.
Horizontal / Vertical bar or picture
shaking
• Check for local interference such as an electrical appliance or power tool.
Poor reception on some channels
• Station or cable channel may be experiencing problems, tune to another station.
• Station signal is weak, reposition the aerial for better reception.
• Check for sources of possible interference.
Lines or streaks in pictures
• Check aerial (Change the position of the aerial.)
No pictures when connecting HDMI
• Check if the input source is HDMI 1, 2 or 3.
Picture appears in wrong ratio
• Adjust the Picture Zoom. Press HOME, select Settings - Picture and adjust Picture
zoom.
The audio function does not work.
Picture OK but no sound
• Press the VOL + / – buttons.
• Sound muted? Press the MUTE button.
• Try another channel. The problem may be caused by the broadcaster.
No output from one of the speakers • Adjust the Balance settings in the SOUND menu.
Unusual sound from inside the TV
• A change in ambient humidity or temperature may result in an unusual noise when
the TV is switched on or off and does not indicate a fault with the TV.
No sound when connecting HDMI
• Check if the input source is HDMI 1, 2 or 3.
Audio noise
• Keep the RF coaxial cable away from other connected cables.
Password
Lost password
• Select the Set Password setting in the LOCK menu, then enter the following master
password “4725”. The master password clears your previous password and allows
you to enter a new password.
JVC 49' LED Smart HD TV LT-49C790 Manual.indd 57
02/10/2019 17:05