If the LG 47LA667S does not have an image, but there is sound, the backlight of the display often just does not work. Moreover, LED-TVs usually fail LEDs inside the panel, less often LED-driver.
In such cases, you can see a barely noticeable image with a successful hit of external lighting on the screen.
To replace the LEDs, disassembling the LCD panel is required - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own for TV owners and craftsmen who do not have experience repairing LCD panels
If there is no image, but the backlight works, the screen becomes a little lighter when you turn it on, and in the open TV you can see the light through the holes in the panel case.
In this case, the panel may also turn out to be faulty - damage to the strips, loops, for example, as a result of moisture ingress after an unsuccessful screen wash, the T-CON (Timing Controller) board may be faulty. But often the MainBoard is also faulty, and a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, you must use an oscilloscope to track the passage of LVDS signals from the MainBoard, as well as synchronizing signals to the driver loops.
Flooded or poorly washed LED-TV screens have the opportunity to recover, in about half the cases, usually if significant damage has not formed in the cables and planks of the panel
1. Service Manual with Schematic Diagram 128 pages of 2013 on models 47LA660S, 47LA660T, 47LA660V, 47LA662V, 47LA667S, 47LA667V, 47LA669V-Z *, 47LA710V-ZA.
SCHEMATIC MANUAL -----------------------> Chassis: LD33B (9.1 Мb).
2. Service Manual with Schematic Diagram MODEL 47LA6608, 47LA660S, 47LA660V, 47LA6678, 47LA667S, 47LA667V -ZA/ZB.
SCHEMATIC MANUAL ......................> Chassis: LD33B (9.1 Мb).
If the LG 47LA667S freezes up during operation, it doesn’t respond either to the remote control or to the buttons on the control panel, sometimes rebooting helps. To do this, you must completely disconnect the TV from the network by pulling the plug from the outlet, and turn it back on after 10-15 seconds.
TV LG 47LA667S with LCD, diagonal size 47 "(119 cm) 16: 9 format. This model uses a panel with the end position of the LEDs in the display backlight - Edge LED.
There is support for 3D images using passive polarization technology.
The display and software of the board provide for viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD).
The 47LA667S is equipped with SMART software (software), embedded applications and the ability to work on the Internet. Connecting to a network can be done via Wi-Fi. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of the digital signal is performed in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
The power of the speaker system of sound 24 W provide 3 speakers. It uses the NICAM stereo audio processing system and Sound Surround.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, RGB, HDMI x3, MHL, USB x3, Ethernet (RJ-45), Wi-Fi, WiDi, Miracast . A headphone jack is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is provided. This interface supports standard resolutions: 1920x1080.
A digital tuner can receive television channels in the DVB-T MPEG4, DVB-C, DVB-S2 standards.
The power consumed by the TV from the network in operating mode is 120 watts.
Overall dimensions: With stand 1069x695x327 mm, Without stand 1069x637x35 mm.
Attention! The panel of the LG 47LA667S LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.