LG 55LH40 55 in. LCD HDTV Logo
Anonymous Posted on Jun 13, 2012

I have an LG LCD 55LH40 tv where the screen went black. My directv was doing some kind of reboot because we had a power outage, bad weather, and it restarted and the tv was on and the screen said the

Black screen, no picture only sound!

1 Answer

Anonymous

Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

  • Master 1,238 Answers
  • Posted on Jun 14, 2012
Anonymous
Master
Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Joined: Mar 05, 2011
Answers
1238
Questions
0
Helped
329842
Points
3603

Good day..

that problem is cause of bad inverter board or T-con board..

If you have backlight the problem is T-con board..if no back light the problem is inverter board..

Hope it helps..

5 Related Answers

Anonymous

  • 346 Answers
  • Posted on Nov 01, 2007

SOURCE: LG LCD TV 32LC4R BLACK SCREEN

change the power regulator

Ad

Anonymous

  • 1 Answer
  • Posted on May 15, 2008

SOURCE: No picture after 20 mins on LG LCD Tv

i have a 32" lg hd flat screen an it now does the same thing i got it on boxing day an its not even 5 months old

Anonymous

  • 1 Answer
  • Posted on Apr 30, 2009

SOURCE: LG 50PX4DR plasma tv

I had the same exact problem as posted above. My 50" LG plasma was out of warranty for 1 year! I called the LG executive call center, and they were very helpful. They offered to pay for the parts and labor. They recommended a few local repair shops, and they set everything up for me. The tech came out within 4 days with one part. The tech had to come out one more time the following week, since more parts were needed for the repair. The Y sustain board, along with 2 adjacent parts that are required to be replaced as a set, and the power supply had to be replaced (parts alone cost just over $900). TV is like new again; I'm very happy with how LG handled it, and made what could have been a bad experience a good one.

Anonymous

  • 10 Answers
  • Posted on May 23, 2009

SOURCE: lg lcd tv screen goes

This sounds like a mainboard problem. Unless you do not see a back light flash when you turn on the TV, which may mean it is an inverter board problem, this is most likely fixable by replacing the mainboard.

Anonymous

  • 1 Answer
  • Posted on Dec 21, 2010

SOURCE: LG 22" LCD Screen went white

same things happened to me...did you solve this?

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
2answers

My tv image goes off while watching tv,I do have audio but no image.

LG 42LS5700 - LG.com

www.lg.com > Home > Support > Product Support

LG ElectronicsTV/Audio/Video; TVs; 42LS5700 ... TV Support Landing Page - HDTV/Netcast/webOS 1.0/webOS 2.0 ... Adjusting Picture Settings - webOS 2.0 Video ... quality and convenience of complimentary shipping when buying directly from LG.com. ... Curved TVs · 22 Inch to 29 Inch Class TVs · 32 Inch to 39 Inch Class TVs · 40 Inch ...

Amazon.com: Customer Reviews: LG 42LS5700 42-Inch ...

www.amazon.com/LG-42LS5700-42-Inch.../B006ZH...

Amazon.com, Inc.LG 42LS5700 42-Inch 1080p 120Hz LED-LCD HDTV with Smart TV (2012 Model). byLG. Size: 42-Inch ..... images are nice and crisp when viewing HD content.

Widescreen TV Black Screen - Repair LCD LED PLASMA ...

? 3:41
https://www.youtube.com/watch?v=RbZncfiOXQA
Jul 13, 2011 - Uploaded by FixItUrselfDummy
Fix your tv with black screen blinking light, popping sound noise. ... Watch QueueQueue ... TV Black Screen - Repair LCD LED PLASMA - Problems SONY LG .... I have a 60 inch samsung DPL tv how can I stop the humming or ... What do I do if my tvturns on but its just a black screen so sound no picture?.
0helpful
1answer

I have a LG 55LH40 LCD TV, which is about 4 years old. In the middle of the screen it has squiggly black lines that hang down and are about 3 in. long. They are especially noticeable on peoples faces and...

If you wish to get some details; visit the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
0helpful
1answer

LG model 55lh40 no picture no sound

check your standby voltage and make sure it is coming up standbys come from the power supply board and if they are present your main board is bad or the main power supply is not working
0helpful
1answer

Horizontal lines shadowed / blured picture after 20-30 minutes

There are some semiconductors or capacitors that are leaky. Might need thorough check up inside the TV.
0helpful
1answer

LG 55lh40 tv will not turn on. I REPLACED THE POWER SUPPLY BOARD AND IT STILL DOESN'T WORK. THE STAND BY LIGHT IS RED. WHEN I PUSH THE POWER BUTTON IT MOVES FROM CENTER TO THE OUTSIDE AND BACK TWICE...

Only a probe with a voltage trace can figure to the possible SHORT in the circuit board. You need to look for possible signs of heating which can be an indicator to a short . Also check for the secondary +B to the circuit, check the path that leads to the drive and see if there is high potential drop, if so check the drop to get an idea of the short. The list of probabilities can be more and so ONLY a good voltage check can pinpoint the case. Take consensus but do not replace board at high cost with just assumptions.
0helpful
2answers

Spot of bad weather here, just had a power surge in the house and now our tv (sharp lc-42SB48UT) won't power on. There is no blue or red light on the front and changing outlets/surge protectors doesn't...

90% to 95% ur tv have a dead power supply board only.5% ur tv could have both dead boards the tv power supply board and the main tv Tuner signal board too.The tv power supply board.That the board,where the power a/c cord plug into it.The tv main Tuner signal board,that the board where all the exstented devices and the tv incomming broadcasting signal cable wire plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement first.The tv problems should be fixed.If not than the main tv Tuner signal board is dead too.Must be replaced also.
0helpful
2answers

I have on LG 55LH40 LCD TV problem 1 Have a

You need to set your aspect ratio, check your manual.
7helpful
3answers

LG 22" LCD Screen went white

same things happened to me...did you solve this?
Not finding what you are looking for?

586 views

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

Grand Canyon Tech
Grand Canyon Tech

Level 3 Expert

3867 Answers

Cindy Wells

Level 3 Expert

6688 Answers

Kolbrun...

Level 3 Expert

1228 Answers

Are you a LG Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...