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Lg 55lh40 stuck in standby green light on main pcb and red standby light on front is on Power button douse nothing

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Sounds like a main board fault. Contact any service technician to confirm it. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up older posts.

Posted on Jan 02, 2014

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Planar PDP42BK Plasma TV

It is the power supply. Replace the C97, C19, and C16 Capacitors with 2.2 uF ones.

Posted on Oct 03, 2007

  • 2 Answers

SOURCE: LG LCD TV Standby Light Flashing Red Continuously

I have had this same problem twice in the past 3 months. So far both times I've been able to get it back after a week or two. I'm not sure what works, but unplugging and detaching the antenna and cable and waiting a few days seems to be the key. In both instances, I unplugged it for a few days then plugged it in for a few days and repeated the processes until I eventually got the steady red led. Both times prior to the red led the led would flash red then green and make a clickiing noise for several hours before I was able to get it working again.

Posted on Apr 22, 2008

dsacco86
  • 1077 Answers

SOURCE: The tv will not turn on with either the remote or

Hi, I own the same TV and had the same problem. It's the #1 plaguing issue with flat panel TV made by Funai corp. Emerson is made by them. Normally, when this happens, the TV goes into " Protection Mode " because of a failing circuit board.

The most common thing to go out on flat panel TVs is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. But, I can't say it's 100% the problem because I can'tactually look at the tv over the internet. I can only make guesses with the symptom. I'm willing to bet you have the same problem like mine. One of six Inverter Transformers when bad on my Power/Backlight Inverter Supply Board. I replaced it and it works fine again.

You have a few choices:

1. You can try leaving the TV unplugged for 30 minutes so the TV can reset itself.


2. If by chance the TV is still under warranty, go that route.


3. If you have some electronic experience, if you can find and purchase a Service Manual at Tvtechcenter.com; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists.Usually, cost under $6. And most cases the new part cost less than $15. The service manual at the site is under LC320EM82S.


4. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.


I hope I shed some light on the subject for you.

Posted on Jul 13, 2009

circuitworld
  • 335 Answers

SOURCE: Tv will not turn on

The green blinks are an error code indicating a specific fault, your power supply developed an 'over-voltage' issue and needs to be serviced at your local repair shop.......

Posted on Nov 03, 2009

jerryg50
  • 1667 Answers

SOURCE: the red standby light flashes and when the power

One of the boards (module) has a short on it, and or the power supply itself is failing.
The service center will find the fault using the process if elimination. They will replace the bad boards or modules as required to get the set working again.

Jerry G.

Posted on Dec 16, 2009

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Just do a hard reset and check. To make it a hard reset, unplug the TV from AC mains wall socket, and re-plug it back after 20 minutes or so. This must make it a hard reset. If it do not help you, the main board to this TV has the fault, and have to be located. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up older posts.

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1. Reset the Video Output Settings. While the PLAYSTATION 3 system is in standby mode (red light on the front of the system), hold down the touch-sensitive On/Off button on the front of the system until the system goes into standby mode again . (So the light cycle would go from: red light to --> green light --> then back to red light) This will ensure that you have held down the On/Off button long enough to reset the Video Output Settings. Once you turn it back on, it should work fine.
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I hope this helps. Good luck to you.

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