Question about LG 55 55LW5600 3D LCD TV

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LIGHTNING STRUCK MY ANTENNA AND SHORTED MY TV IT COMES ON BUT NO PICTURE OR LIGHT OR SOUND.

LIGHTNING STRUCK ANTENNA NOT POWER BECAUSE SURGE PROTECTOR AND OTHER DEVICES ARE FINE THE POWER LIGHT COMES ON BUT NOTHING WORKS

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  • 291 Answers

I once had lightning enter a screen window, hit the TV and blow the control knobs off of it before jumping into the kitchen and pealing the counter's top. That dates me as TV's do not have knobs now. Woefully, what it would cost you in labor to have the internals of the TV checked and then replaced (and the delay while you wait) will make you purchase another set. There is just no way to predict how much if not all the circuitry was fried. When the lighting entered the antenna, it ran wild in the TV's circuitry and those are very tiny and vulnerable tracings that got "stomped" upon. I think you will find that the only thing that will work IS the power light. Why does it work and not the TV? Because the lightnings current did not run through the power line and thus blow the power indicator light! It came only through the antenna and fried the circuitry there before it ever reached the power indicator light. I presume this was not a surge protector that had a connection for the antenna. Even it had such, it is unpredictable whether it would protect the TV. Your TV is toast.

Posted on Nov 25, 2014

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Posted on Jan 02, 2017

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SOURCE: blinking power light

This set has a power supply and signal PCB. Since the indicator light is blinking, I would consider the problem to be a missing voltage from the power supply. Unplugging the set for a couple minutes may solve the problem. If not the set may still be under warranty. Contact LG (800) 243-0000 for a servicer in your area. Hope this helps.

Posted on Apr 29, 2007

dsacco86
  • 1077 Answers

SOURCE: My lg tv wont turn on.

First, I would try leaving the TV unplugged for an hour so the TV can discharge and reset itself.
If this doesn't work, it maybe something simple like a blown fuses inside the TV that needs replacing.Radio Shack or some electronic store will carry the fuses.
If the other two ideas doesn't solve it, we're talking about a power supply board related problem. I can't actually look at your TV over the internet. But, the most common problem with flat panel TV are the power supply board for the screen itself and the main power supply board for the rest of the TV. Commonly a bad capacitor or transformer will be on the board.
If you have some electronic experience and want to repair it yourself, you can sometimes find a Service Manual for your TV over the internet. Normally, costs less than $20. It will have diagrams, schematics, and part number list for the TV.

Posted on Sep 09, 2009

ginko
  • 19396 Answers

SOURCE: Power went off and then tv will not start

The TV is on protect mode.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.


If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Posted on Sep 10, 2009

Testimonial: "Thanks. You seem to have covered the problem which I will try before getting some technical help."

joeguest2
  • 2080 Answers

SOURCE: All of a sudden the

Normally this is indicative of a faulty power supply circuit inside your TV.

The easiest way to test this is to remove the rear access panel on the TV and replace the power supply circuit board with a new one.

You can find a replacement circuit board on Ebay by searching for your TV's model number.

Here is a link to one currently available for about $129 plus shipping:


http://cgi.ebay.com/LG-EAY32731102-6709900017C-SMPS-Power-Supply-Board-/170641303008?pt=LH_DefaultDomain_210&hash=item27bb03a5e0

Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information and items at the website indicated.

The repair / replacement procedure is not extremely difficult if you have some basic electrical safety knowledge and some basic electronics / mechanical repair skills.

You will need to unplug the power cord from the unit, lay the TV screen side down on something soft and flat like a bed, and then remove the rear access panel or the entire rear cover as required in order to access the circuit boards inside.

Then unclip and remove the various electrical wire connectors leading to the power supply circuit board. Then remove the screws securing the circuit board to the TV frame and then remove the power supply circuit board. Be sure to avoid touching any large capacitors on the circuit board which can retain a nasty charge even after the unit is unplugged.

Then just screw in the new circuit board and connect all the wire bundles to their appropriate connectors on the new circuit board and then replace the rear cover. Then plug in the power cord and test.

Please comment back here to this page if you have any details to add, have any questions, have difficulty accessing the links, or just require further general assistance and I will respond as soon as I see it.

I hope that was helpful to you, good luck.

Joe.

Posted on Jun 20, 2011

gopakumarg43
  • 75304 Answers

SOURCE: have a 42lg50ug.auslhr recently had a power surge in home tv has no sound or picture tried to connecting to different outlet in another room but it still wont show a picture or hear a sound

Hrllo
The power supply board of your TV is faulty. It canbe either the fault of a protection fuse, of switching regulator components. We can't predict, which will be faulty, becuse, the set has damaged during a power surge. If you have knoledge in electronics, and some experience in service electronic equipments, you can do it yoursef at home. Some power supply board faults are repairable, by replacing the defective components on it. But, to detect the defective component you must have its schemaic diagram [Service Manual] with you. Witheout it, you can't get what exactly had happend to the board. I've the service manual for your set, but I can't, send it to you without prior permission from Fixya. Toe get it, you have to get me over Fixya, by purchasing onw amoung my LD services advertised there. Unlike previous Fixya Site, the new one is different, and you can choose the experts you want to. The picutre of the power supply toy your Tv is attached here.
11_13_2011_4_26_16_am.jpg

Posted on Nov 13, 2011

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Lightening may have caused a surge on your power lines to the house and to the outlet the TV was on.
Do other things work on that outlet? If not you tripped a power breaker.If they do work check this.
Unplug the TV for 2 min or more and plug back in.
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(no surge protector?) Bet you'll buy one for your next TV.
Look for 3000 joules and up rating for a surge protector and insure it has protection for a cable/antenna input too.
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Time to take it to a repair shop or depending on it's age (5 years+) it may be time to buy a new TV and surge protector.
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