Question about LG 42LB1DRA 42 in. LCD Television

1 Answer

Tv does turn on but no picture.when reset the power, the power light red comes on and when push the power on, normally it is green and now it is white light blinks with no picture.

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 4 Answers

I had the exact same problem, same TV... LG 42LB1DR. TV just shut down one day after 27 months. Power stayed on and the LCD had power but no audio or video. I went online and found this forum. I purchased four 2200uF @ 25v, and one 1800 uF @ 35v Panasonic capacitor's for a few dollars at DigiKey. I upgraded to 25v & 35v from 10v & 25v respectively because it seems that the originals were under-rated. The tv came with 10v Samxon caps that seem to be problematic in all the units they were used in. Do not buy Samxon if you do this yourself.... I opened the set by taking off the plastic back panel and then by removing the second metal panel. There are a lot of screws, and you also have to remove the nuts on the F connector bodies and the retaining screws on the D-sub connectors as well as some small screws around the HDMI input and analog / composite connectors. There are three boards and a hard drive. The board on the far left just above where the plug goes in is the power supply board. There are five data cables and one red power cable attached to it that can be removed simply by carefully unplugging them. The board is fastened to the unit with five small screws, one on each corner and one in the middle of the right side. If you look for three green capacitors grouped together around the middle of the board and slightly off to the right, you will probably see one or more that is bulging out at the top. This is most likely "C235", the main problem. The other three caps that need replacing are C202, C201 and C219. C219 is closer to the top part of the board. There is also the 1800 uF cap which I've seen go bad once, but didn't note the number.

You'll want to make sure that you put the negative terminal of the capacitor through the right hole, otherwise you will pop the cap. The negative terminal is clearly marked on all the capacitors. With needle nose pliers, grip the cap and pull down while heating up the terminals. The cap will eventually come out. A de-soldering bulb, solda-pult, or solder-wick make this easier. Put the new cap in (you may need to heat the solder that is left on the board to clear the hole so it can push through). When both terminals are through, bend them slightly so it stays in place. Take the solder and stretch out a few inches off the roll and while holding it in one hand, lightly touch the base of the terminal where it comes through the board, with the soldering iron and the solder at the same time. --- Try not to use too much solder.. you only need a tiny drop. This will solder the cap in place. Cut off the terminals close to the board with some snips and repeat this on the other three. Put the board back in, plug in the cables. Test the TV before putting the back panels on. It should work fine if all went well..... If you hear a pop than you reversed the terminals on a capacitor and that one will need to be redone correctly.... This might sound lengthy and potentially difficult but its worth a try. Otherwise you can pay someone to replace the entire board for BIG BUCKS with the same junk caps on it and have the same problem in a year or so. LG doesn't want to take responsibility for this and I'm sure that it has cost a lot of people a lot of money for about $8 in parts........... This worked for me and it can work for anybody with the same problem.. Good Luck!

Posted on Oct 23, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have my ps3 plugged in but powered off so just a red light is on.i push power button light turns green I hear fan come on and everything sounds normal but it has no picture at all.it takes cd no pro


Rudy, are you connecting to the TV with HDMI, or RCA cords? HDMI carries both picture and sound thru 1 cord, whereas RCA splits it to YELLOW RED and WHITE. The HDMI connection is automatically detected when connected to your TV. It will say"HDMI is detected, do you want to use these settings?" RCA is not automatic, and is prone for the video(YELLOW) cord to develope a bad connection. I wouls duggest first replacing the cord. They are inexpencive, and the fastest way to check your issue. I am going to include a link to a youtube video that will guide you through the steps on how to reset your video settings on your system.
How To Reset PS3 Video Settings PS3

Oct 08, 2014 | Sony Playstation 3 (PS3) Console

1 Answer

My akai flat screen tv is not turning on. the red light at the bottom of the tv is on and when the tv comes on the red light turns green and in a few seconds the tv comes on, when i press the power button...


i have one of these akai 27 inch with dvd, i had a similar issue i found a power supply at auction and exchanged it and it works fine now, normally with this symptom your power supply is fualty. if the light goes green and you have no picture then you know other boards are fualty

Jun 04, 2010 | Akai LCT3285TA 32 in. LCD Television

1 Answer

Green power light comes on for a split second, then red.


The power supply (AC adapter) is bad. It has enough power to light the red LED, but not enough to power the TV.http://shop.ebay.com/?_from=R40&_trksid=m38&_nkw=12+volt+5+amp+power+supply&_sacat=See-All-Categories

May 23, 2009 | Proscan 19LA25Q 19 in. LCD Television

1 Answer

TV turns on the on/off light turn red and green coninually


IT MAY SOUND WIERD BUT SAME HAPPENED TO ME, CHECK THE POWER CORD, NOT WHERE IT GOES INTO THE WALL, BUT WHERE IT GOES INTO THE TV, TRUST ME, JUST PUSH IT IN MORE.

Jan 30, 2009 | Akai PDP-5016H 50 in. HD-Ready Plasma...

1 Answer

No picture on TV with powerlight on


If you press the power button *on* your TV (rather than using the RC), does the power light still stay on red rather than turn green?

Jan 05, 2008 | Televison & Video

Not finding what you are looking for?
LG 42LB1DRA 42 in. LCD Television Logo

782 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers

The Knight
The Knight

Level 3 Expert

74244 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18394 Answers

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

Answer questions

Manuals & User Guides

Loading...