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LG 55 IN LED MODEL 55LH90-UB HAS DIM BACKLIGHT NO PICTURE .. NO SOUND,REMOVED BACK COVER.. FOUND ONE FUSE CHECKS OK AND ALL CAPACATIORS LOOK OK ANY SUGGESTIONS

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: lg plasma 50px4d-eb keeps going into standby mode

good grief - my TV just did the same thing - its locked in standby mode - I disconnected power several times - each time i reconnect the green light comes on for about a minute 9nothing happens on the screen) and then returns to the stanby mode

Posted on May 18, 2008

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SOURCE: No picture on LCD tv but sound works!

Yes, i would get it checked first to make sure it is the backlight, if you can see a slight glow around the edges then the backlight is working.

Posted on Dec 13, 2008

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SOURCE: No Picture on LG 42PX5D

You will have either a fault with the Y-Sustain board (this I would assume from your description is the board you changed the fuses on) or the buffer board which is the long panel to the left of this board. It is probable one of the drive ICs on this board has blown & a replacement board is the best solution.

Posted on Jun 30, 2009

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SOURCE: I am taking delivery on an LG 55LH90 TV on Friday,

The problem with the audio being out of sink is with the cable provider not the tv.

Posted on Sep 16, 2009

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SOURCE: LG 42PX4MVH PLASMA TV - Sound but no picture.

I have the same issue with my LG 42PC3DVA and I narrowed it down to the Y SUS board. After a little research there are a few items that are prone to go. The ceramic fuses (as you found), sometimes the capacitors on the Y SUS, Z SUS, and power supply go along with them You can tell because thy will be bulged at the top instead of flat. I replaced a few of my capacitors - they are only $0.89 each so it was MUCH cheaper than a board.

The other thing that is common on the Y SUS in particular are the FETs (also called MOSFET). They can be replaced if you are good with a soldering gun but they are static sensitive so be grounded. They are also a bit tricky to test so you may want to do some research on how to determine if this is the issue... or you can just replace the whole board.

Posted on Oct 28, 2009

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1 Answer

LG 55LH90-UB LED TV I have an LG 55LH90-UB LED tv that has, what seems to be, sections of dim areas.


Hi ,
try swapping the screen with another one to just see if it is behaving the same, because some times the screen circuitry or the led screen could be damaged .

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My LG tv (Model number: 32LS3410-UB) has sound, but no picture. When I do the flashlight test I can see a very dark image on the screen. Will replacing the LED driver fix this problem?


If you already tested with the flashlight which is the first step in the blank screen with sound fault then you have to test the LED Backlight supply voltages if you are familiar and good in the electronic repair. First you have to check if bulging capacitors for the LED Backlight drive voltage circuit, replace them. If capacitors are good then you have check the backlight LEDs. The flashlight test proves that the power supply is good and TV is working fine because the sound is ok and picture is fine. Attached videos and links may help you for the repair and replacement of backlight LED strips or LEDs itself depending on the type of LED strips used in your model.
https://www.youtube.com/watch?v=Z1DEkSguWtg
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May 08, 2017 | LG Televison & Video

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I have an LG 47LN522-UB LED TV that stopped working after three years and need help diagnosing a problem with it.


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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Picture dimmed. can see the picture and in menu increased the backlight to max but did not go back to normal. checked eco settings and did factory reset. still very dim but can see the picture.


Yah kindly follow this tip. After loosing the back cover when the tv power cord is removed from power socket, check for bulged or defect power capacitors in both the primary & secondary side of the power pack if found any kindly replace it with the actual or equivalent value as this electrolytic capacitor defects is much common for Samsung power packs

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Ur LCD inverter backlight board have problems,just not dead yet.When ur LCD inverter backlight board is dead.U will get only sound and no picture at all.

Feb 26, 2010 | LG 55LH90 55 in. LCD HDTV

1 Answer

55" lcd led


Sounds like the backlight may be going out. This is often a problem when it is not powerful enough or is defective. Contact LG to see about warranty support.

Dec 01, 2009 | LG 55LH90 55 in. LCD HDTV

1 Answer

We just bought a 55LH90 LG LED tv. Our directv


I used my directv remote to access the setup and was guided through the steps to make my directv remote the "do everything" remote.

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