Question about LG 55LA6200

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The screen of the tv turned off autimatically after 10, 20, 30,etc.. the sound of the is well actived (only screen failure).

I have a bought a new tv (10 days). After turning on the tv the screen of the turned off automatically (2,3,5,10,etc minutes. The sound system is working well, only the screen of the tv failed.

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  • LG Master
  • 33,294 Answers

Probably the internal power supply is gradually failing.

Posted on Jan 01, 2014

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

rlamkin
  • 44 Answers

SOURCE: My LG-37" Flat-Panel LCD HDTV-37LC7D turns on automatically

The main board needs to be replaced.

Posted on Jul 03, 2008

gsalmen
  • 77 Answers

SOURCE: lg tv automatically turn on and off. Power surge

the software in the main control is damaged. call your lg servicer in your area. he might get you a software update

Posted on Jul 09, 2009

budmrtn
  • 11361 Answers

SOURCE: Screen goes black after a

It can be bad power supply module due to bad caps,
Bad Z sustain and Y sustain boards.
You need to check those 3 boards for bad caps, blown fuses, etc.

Parts: www.shopjimmy.com

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Posted on Dec 25, 2010

  • 11800 Answers

SOURCE: Just bought an LG Plasma

The tv is faulty and the fact that it failed immediately after you have started it for the first time is a clear indication of a manufacturing defect.
Take the tv back to the seller and ask for a replacement one or your money back.

Posted on Jun 01, 2011

jerryg50
  • 1667 Answers

SOURCE: lg 42le4500 tv when first turned on its okey after 2 minutes no picture black screen but sound ok, turn it off and back on againdoes the same

I would bet on some component(s) have become thermo sensitive. Most of the time capacitors can do this type of thing. Most likely the defective caps could be in the power supply.

To locate the defective caps, you would have to be able to run the supply and use the combination of a heat gun and freeze spray (liquid air spray) for cooling. At the same time you would have to monitor the output of the supply to see the components that cause the output change.

It is also possible to have thermo sensitive components on any of the other boards. This would also require proper troubleshooting.

The service rep would replace boards until he found the defective board. Then he would return the set with the new board and the bill for his work.

If your set is out of warranty, it may be better to consider a new set. Servicing these can be fairly involved and expensive.

Jerry G.

Posted on Jun 26, 2012

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