Question about LG 52LG70 52 in. LCD HDTV

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I have a 52LG70 that won't turn on out of standby mode. When the TV is turned on the indicator changes from red to blue but there is no picture. No menus or settings are displayed. When I unplug t

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  • LG Master
  • 14,553 Answers

If you are able I would suggest taking back off and "looking" at power board.

You want to see if any puffed up caps on that board(follow power cord to the board).

If you are not able to do that consider having a shop look at it before more damage can happen.

Here is what to look for if you get it open:


I have a 52LG70 that won't turn on out of stan - 12_3_2012_3_39_25_pm.jpg12_3_2012_3_39_49_pm.jpg

Posted on Dec 03, 2012

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

SOURCE: tv turns off after 15 minutes of use

For bobby11 and luis, it is the power supply. Part Number EAY34797001 in the 42" and EAY34796801 in the 32". This is a known problem, and somebody should start a Class Action against LG over this one. Part is available online and easy to swap out for anyone with the most basic knowledge.

Posted on Oct 08, 2008

  • 2315 Answers

SOURCE: My LG Plasma 42PC3D turns on and off repeatedly. I

Your plasma TV has a power supply 6709900019A. These power supplies failed due to defective capacitors. See the picture below and check the capacitors mark with the red lines. There are 10 capacitors that should be replaced even if they do not show signs of bulging/swelling on top.
The value of the capacitors is 3300uF/10V but you can use 25 volts as long as they fit in the space provided by design.


4c29d64.jpg

Posted on Sep 24, 2010

  • 208 Answers

SOURCE: pink screen or scambled picture when turning on tv to watch dvd

I have seen several LG plasma that have a pink picture and everytime it has been a failed control pwb. This bd is located under the assembly that houses the main digital bd. The main dig. bd is the one with all of the inputs.

Posted on Feb 14, 2008

freetek
  • 5568 Answers

SOURCE: TV will not power on.

The clicking you hear is a relay that connects, then disconnects the AC to prevent fire or further damage.

If it just fails to turn on, the main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself.
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.

Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.

There are likely two power supplies, a main (larger) and possibly a separate supply for the plasma display.
Without inspecting your set it is difficult to determine which may have failed since the high voltage supply may use an output from the main supply.
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace it or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.

Not easy to diagnose without having made a few measurements first.

Posted on Sep 29, 2009

Testimonial: "Thank you for the insight, I will follow your suggestions and see where the path leads!"

  • 979 Answers

SOURCE: my lg 50pc3d will not turn on the power light

Hello sir, hi, the symptom you have describe can be traced on the Power Supply board, either minor problem such as loose connections and screws, or a major one that needs replacement of the entire Power supply board. You choose:
Have a look, and check for loose contacts, screws that needs to be tighten but you need to open up that big TV.
Or if that does not solve the problem, its the major one, needs to replace the entire PS board.

Posted on Mar 13, 2010

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I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
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Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

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Hi! I am experiencing the following three


Hi Rafael,

First of all thank you for posting your question here at Fixya.
Please confirm if the brand and model number above is correct.
Blinking of the the LED (yellow and blue) at the front panel indicating that the lamp door cover is not seated properly. This cover will engaged to a micro switch giving the signal to the processor, once it is in open position, the unit will not power up and will experienced that kind of blinking error code. Go back to the lamp door cover and ensure that it is properly seat-in.
3D, 2D, red/green/blue ghost on the picture and letters means that the convergence circuitry gone bad. Symptoms is not connected to the light engine. The faulty parts is the convergence chips(IC). This chips are mounted on the large aluminum heat sink and starts with STKXXXX-XX (X means number). The most common STK chips used on Projection TV's is the STK392-110. You have to replaced them both on the board to resolve the issue(red ghosting). It is necessary also to check the resistance value of the resistors around its circuitry using the multimeter. For more info how to repair a convergence problem, watch the video below.




Jdvillanueva

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1 Answer

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I bought my son a 19" philips tv model # 19pfl340d/27.in order to turn tv on it must be unplugged for 10-15 minutes.The first one I bought did the same thing and I returned it.this one is exactly the...


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1 Answer

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