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LG 47LA7400 Support Question

LG 47LA7400 Support Question

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Question posted by aokim04 on February 2nd, 2016

Hdmi No Signal, Screen Distorted

1st problem is the HDMI will have no signal. I know the HDMI cable is good because it works on other TV. 2nd issue is the screen is distorted (horizontal lines) when I turn on the TV, but will go back to normal after few minutes.

Current Answers

Answer #1: Posted by hzplj9 on February 3rd, 2016 3:09 PM
This answer was accepted by the poster of the original question.
hzplj9

Member since:
June 25th, 2012

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Have you tried other inputs to see if the problem is the same on those? Ift hey are the same then I would suspect a problem with a panel inside the TV. i.e. the main logic. This would need the help of an engineer to solve. You could try a factory reset. This often sorts out anomalies with inputs and settings that are out of spec.

This is a link to the on-tv manual.

http://www.manualslib.com/manual/441338/Lg-47la6900.html#product-47LA7400

Hope that helps.

Related LG 47LA7400 Manual Pages

Owners Manual - Page 1

Please read this manual carefully before operating your set and retain it for future reference. 47LA6900 47LA6950 47LA7400 55LA6900 55LA6950 55LA7400 60LA7400 P/NO : MFL67652612 (1302-REV01) www.lg.com OWNER'S MANUAL LED TV * LG LED TV applies LCD screen with LED backlights.
Owners Manual - Page 4

...and signal cables on the wall, make sure not to the AC wall outlet, it can occur. Section 810 of the TV. Antenna...lines or circuits as to fall into the product, and do not drop anything onto the screen. yMoving Make sure the product is turned off , unplugged and all cables...used with cloth or other liquids directly on the front panel of the lead-in any objects to provide some ...
Owners Manual - Page 5

...long period of current to radio or television reception, which the receiver is common ...distortion effects on the TV screen for a Class B digital device, pursuant to radio communications. Any changes or modifications in construction of this device which supplies a large amount of time, it for long periods of the TV. Electrical circuit humming/panel buzzing: A low level noise is turned...
Owners Manual - Page 6

...will perceive more stereoscopic depth compared to the TV than the youth. Symptoms may cause eye strain or image distortion. yElderly - yDo not watch 3D videos... with chemicals. Viewing 3D content for example: trying to touch the screen or trying to scratched. CAUTION Viewing Environment yViewing Distance - Children under... your normal glasses, sunglasses or protective goggles.
Owners Manual - Page 8

... 37 Cleaning Your TV 37 - Attaching the stand 15 - yNew features may differ from the input source or product model that shown in this TV in the future. Tidying cables 17 - Connecting to Take when Using the Magic Remote Control 30 WATCHING TV 30 Turning the TV on a table 16 - HDMI Connection DVI to HDMI Connection 26 Connecting...
Owners Manual - Page 9

...screen. It is made. NOTE yThe items supplied with your TV's USB port. CAUTION yDo not use the TV network functions only when the network connection is actually part of product functions. yUse an extension cable that supports USB 2.0 if the USB cable... the safety and product life span. yFor an optimal connection, HDMI cables and USB devices should have a thin film on the model.
Owners Manual - Page 15

...flat surface for proper ventilation. A space of the screen can properly support the TV. CAUTION yDo not place the TV near the TV and the TV has enough distance from the wall for easy swivel. Otherwise, the product could fall due to balance problems...the TV to suit your view. (For 47LA6900, 47LA7400) 10 cm 10 cm (4 inches) 10 cm 10 cm 2 Connect the power cord to use the TV ...
Owners Manual - Page 18

.... For more information on a DVD recorder or VCR, make sure to connect the TV signal input cable to the external equipment's manual for antenna. Connecting to an antenna or cable Connect an antenna, cable, or cable box to watch TV while referring to the TV. 18 MAKING CONNECTIONS MAKING CONNECTIONS You can connect various external devices to the...
Owners Manual - Page 19

Connect the external device and the TV with a high-speed HDMI cable, digital audio can be connected to HDMI 1 if you use ARC. Choose any HDMI input port to 1080p and higher. yHigh Speed HDMICables are tested to carry an HD signal up to connect. Transmits digital video and audio signals from an external device to 192 KHz...
Owners Manual - Page 20

... IN (*Not Provided) DVI OUT AUDIO OUT DVD / Blu-Ray / HD Cable Box Connect the external device and the TV with the DVI-HDMI cable as shown in the following illustration. Choose any HDMI/DVI input port to the TV. 20 MAKING CONNECTIONS DVI to HDMI Connection Transmits the digital video signal from an external device to connect.
Owners Manual - Page 21

... 3 (MHL) MHL Cable (*Not Provided) Mobile phone ENGLISH yThis only works with an MHL-enabled phone. your mobile device is disabled - yRemove the MHL cable from mobile phones to television sets. MAKING CONNECTIONS 21 Connecting to a mobile phone Mobile High-definition Link (MHL) is an interface for transmitting digital audio/visual signals from the TV when: -
Owners Manual - Page 22

... in black and white or with the corresponding color connection. NOTE yIf cables are matched with distorted color. yCheck to ensure the cables are installed incorrectly, it could cause the image to the TV. 22 MAKING CONNECTIONS Component Connection Transmits analog video and audio signals from an external device to display in the following illustration.
Owners Manual - Page 29

...register the Magic Remote Control (Wheel) To register automatically, turn the TV off and back on and press the Wheel (OK). If the AP is completed, the completion message appears on the screen. »If the pointer has not been used for 5... pointer by following "How to left , right, up or down. »If the pointer does not work properly leave the remote control for 5 seconds toward the...
Owners Manual - Page 30

... set-top box for the first time, the Initial setting screen appears. NOTE ySelect Home* when prompted. 30 WATCHING TV ENGLISH WATCHING TV Turning the TV on for the first time When you turn the TV on for each watching type. Language Selection*  Selects a language to turn the TV on country) Auto Energy Saving mode Setting Select Auto...
Owners Manual - Page 35

...TV) yVideo, which is input as below media contents is switched into the 3D screen automatically. 3D supported mode automatically Input HDMI USB DLNA DTV Signal 1080p 1080i 720p 480p Horizontal... Side by Side , T/B : Top & Bottom, F/P : Frame Packing, F/A : Field Alternative L/A : Line Alternative, S/S Full :Side by Side Full, C/B : Checker Board R/I : Row Interleaving, C/I: Column Interleaving...
Owners Manual - Page 36

Component - ATV(CVBS) - Signal HDMI-PC HDMI-DTV 1080p Others Interlace Progressive USB / DLNA (Movie) USB / DLNA (Photo) Miracast™ / WiDi 704 x 480p (Over) 704 x 480i (Over) 704 x 480 (Under) 320 x 240... EXTERNAL CONTROL DEVICE SETUP To obtain the external control device setup information, please visit 'www.lg.com'. 36 SPECIFICATIONS / EXTERNAL CONTROL DEVICE SETUP Input TV -
Owners Manual - Page 37

... your TV regularly to keep it may result in the wall outlet by connecting other cables. yCheck if there is produced. yIf there is no sound is any chemicals, such as waxes, benzene, alcohol, thinners, insecticides, air fresheners, lubricants, as this may result in scratches on the screen and image distortions. CAUTION yBefore Cleaning, turn...
Owners Manual - Page 39

... NOT fit all cords and cables connected to safely install your flat panel display, contact your purchase! WALL MOUNTING: IF YOU DECIDE TO WALL MOUNT YOUR FLAT PANEL DISPLAY, ALWAYS: y Use .... However, flat panel displays are popular purchases. y Don't allow place flat panel displays on the proper stands or installed according to walls with furniture and television sets. Care...
Owners Manual - Page 47

... * Commands may work differently depending on /off. Screen Mute (Command: k d) To select screen mute on model and signal. 01. Transmission ...Works TV is available. * Full wide mode may work differently based on only, TV will not display OSD. 04. You can also adjust brightness in the Q.MENU. You can also adjust volume with the volume buttons on , TV will display On Screen...
Owners Manual - Page 48

...- 00 : Terrestrial TV (ATV) - 80 : Cable TV (CATV) You can... Screen off when controlling remotely. Tune Command (Command: m a) * This command may work ...panel controls on model and signal. • For Europe, Mid-East, Colombia, Asia except South Korea and Japan, Model Select channel to following physical number. Transmission [j][p][ ][Set ID][ ][Data][Cr] Data Min : 02: Orbiter 08: Normal...

LG Knowledge Base Results

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    ..., power line adapter, or a network cable built into your network can also enter all of network device (router, switch, hub, etc). So, what happens when you don't know when the physical connection is the problem? Or, the router will run over your setup from a speed test website. display screen on . To test your TV can 't Turn off...
  • NetCast Network Install and Troubleshooting - LG Consumer Knowledge Base
    ... router? Known Device Issues DEVICE ISSUE RESOLUTION Some Belkin Routers Firewall blocks Netflix Turn off . Internet apps appear to your power line. If you changed any known problems that will not let the TV join your router. If a customer's account is the actual cable connection to work or there are the same cable. Always deactivate your LG TV, you 're...
  • Notes on connecting a PC to a TV - LG Consumer Knowledge Base
    ...Television Picture Color Television No Power A/V Connection Guide Television: Firmware Updates - When using the control panel installed by your LG TV will automatically choose the correct monitor driver. Most of the connection types on the PC using an HDMI cable, there are listed in the manual. Try a different DVI to . Screen adjustments are 3 types of audio signal from a PC...HDMI...

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