LG LCD TV 42DL550 Fix

How to repair an LG LCD TV main board.

 

This is a simple method to fix a TV or other electronic device with bad solder connections.  The TV I fixed is an LG 42″ LCD TV Model 42LD550-UB.CUSWLHO.

Symptoms

The TV would power on and the LG Logo screen with the clock would appear.  It would freeze on the logo screen.  It was stuck there and would not boot any further.  The none of the buttons would work.  It was totally stuck.

First I tried unplugging it for about 15 min to reset everything, but that did not make a difference.  Note:  It’s always good to try this first on any electronic device.  Also if the device has any kind of factory reset button, always try that as well before taking it apart.

I searched around online and found other people reporting issues with this TV.  HDMI ports not working, no inputs working, Lines on the screen, fuzzy video, etc…  It seems many different makes and models are affected.

I removed the board and I did not see any physical damage, no components looked fried or burnt, no capacitors looked bad, and all the connectors looked to good.  This lead me to believe the main control board Model EBT60955753 LG MAIN (3642-1052-0150) could have one or more bad solder joints.

This TVs was purchased in 2010 and out of warranty.  A new board was hard to find, and too expensive.  I decided to try this simple repair myself because I had nothing to lose!

Summary

To fix it, I baked the main board in a electric oven for about 10 minutes at around 385 °F and It worked!

Explanation

Why did this work? After heating and cooling for years, tiny cracks can form in the solder connections.  Heating the board to 385° F (above the solder melting point) caused the solder to melt and these cracks flow back together.

Believe it or not, this trick works on more than just this TV.  This can fix a long list of other electronics.  It’s not uncommon for manufactures to under cool their components, and/or ship electronics with bad solder.  Poor ventilation, bad fans, small heat sinks, dust, stress, and other factors can also cause over heating or cracked solder points.  Even a very tiny crack that you can not see can cause a bad connection.

Warning:  Attempt at your own risk!  Safety First! Always wear protective gear when working on electronics.  Safety Glasses, Gloves, etc…  Remove Electricity from the device (unplug) to Avoid Shock!

 

Again, attempt at your own risk!  This will void your warranty, and possibly damage the board.  I have only tested this on an LG 42DL550!  Other readers have had success on different models so search through the comments.  I would only try this if the TV is unusable and you have nothing to lose!


Let’s Do This!  Step-By-Step DIY Fix:

 

– Remove the board from the TV

LG MainBoard EBT60955753 (3642-1052-0150)

LG LED TV Control Board EBT60955753 (3642-1052-0150)

  • Step 1.  Call LG and complain.  Everyone complaining to LG might make them understand how unhappy people are, and they’ll see this is a known issue!  Maybe if you play your card right, they will admit this is a fault with their product and send you a replacement.
  • Step 2.  UNPLUG THE TV before you touch it!  Electric shock can cause death!
  • Lay the TV down on its face. (Put it on a blanket to be careful not to scratch the LCD)
  • Remove the stand from the TV. (remove the four long screws at bottom and the stand slides out)
  • Remove the back cover from the TV.  (don’t forget the screw near the power plug, and the one in the middle of the input jacks.)
  • Take pictures of the Board from all angles.  Make sure to get good ones of all the connections.  You can use these pictures later to make sure you reinstall it correctly.
  • Remove all the connections. (Be gentle, they should come off easy, if you are doing it correctly)
    • How to disconnect them isn’t obvious to the inexperienced.  Use the picture above for reference. (Click on the picture to enlarge it!)
    • On the upper right there are two ribbon cables. To disconnect these, gently lift the thin black plastic strip on the connector (it flips up), then you can pull the ribbon cables out.
    • On the lower right there’s a wide header block with gray wires. Squeeze the sides (opposite ends) of the connector to release it and pull up.
    • On the upper left are two other connectors. In the center of these is a small plastic part. Press down gently on the edge of that (the edge near the wires), causing the opposite edge to lift a bit to unlatch. While pressing, pull gently in the direction of the wires, away from the board.
  • Once all the wires are disconnected remove the six (6) screws holding the main board to the frame.
  • Remove the black plastic face plate from the side input jacks. (No screws, it’s held on by it’s plastic clips).

– Bake The Board

  • Now we are going to bake it in a conventional electric oven.  (Do NOT use a microwave, gas oven, open flames, Air Forced Heat, or any other type of heat!)
  • Why not use a heat gun?  A heat gun is forced air like a hair dryer.  As soon as the solder melts, the air will blow the components out of place, or even go flying off the board.
  • Why not use a gas oven?  Open flames can be dangerous in this situation.
  • Why not use a microwave?  Never put metal in a microwave!  Very bad things can happen.
  • Preheat the oven to 385 °F (196 °C)
    • The correct Temperature is IMPORTANT.  If you don’t trust the temperature setting on your oven, or if your oven does not have a temperature setting, then get a baking thermometer and test your oven!
    • 385 °F is working for most people, but there are different kinds of solder.  Altitude and humidity might also play a factor.  Most solder melts between 360 and 419 Degrees Fahrenheit or 180 – 215 Degrees Celsius.
    • Solder is a mixture of Tin and Lead.
      50 Tin/50 Lead: melts between 183–215 °C (361–419 °F)
      60 Tin/40 Lead: melts between 183–190 °C (361–374 °F)
    • NOTE:  These temperatures might sound scary, but the ignition temperature of paper is around 451 °F so these components should not be damaged at these temps in an electric oven.  Again, this is why we only us an electric oven.  No open flames!
    • See https://en.wikipedia.org/?title=Solder for more details about Solder.
  • Place the board face up on something nonmetallic like a piece of cardboard.  A pizza round or similar works well. (Do not put it on anything metal because the solder will stick to it.)
  • Place it on the center rack of the oven.
  • It will smell funky when cooking so you might want to open a window and/or turn on a fan!
  • Let it cook for about 10 min.
  • Turn the oven off and let it cool.  (Be careful!  It’s hot and will burn you!  Use oven mitts!)
    • Do not to bump or disturb it while it is cooling!
    • I would not move it until its below 300 °F, so you don’t disturb any components!
    • Just turn the oven off and leave the board in it with the door open until it’s cooled off a bit.
    • If you take it out of the oven while it is still hot, remove the board very carefully, let it cool at least 30 min before you touch it.

– Install and Test

  • Install the main board in the reverse order that you removed it. (Refer to your pictures)
    • Make sure you get all the cables in the correct location.
    • Double check each cable to make sure it’s connected correctly.
    • Check your pictures to make sure you have everything correct.
    • You might want to leave the back off until you test it in case it doesn’t work, and you need to bake it again. Just do NOT touch anything back there with it plugged in!  BE SAFE!
  • Turn on the TV and see if it works.  (Note:  Wait at least 10 Seconds after turning it on because it seems to take a long time for this particular TV come on.)
  • If it does not work:
    • Try cooking it again for 15 min.
    • 10 min. worked for me on the first try but results my vary…
    • Try a higher temperature 183 – 215 °C (361 – 419 °F) as noted above.
    • One reader noted he went all the way up to 482 °F (250 °C ) although I highly recommend staying below 425 °F.  I’m guessing his oven settings are off.
    • Another reader said he put a weight on the LVDS chip while baking and that worked.
    • Read through the comments, there’s a lot of good info in there.

Please comment to let everyone know how it went for you!  Include the Make and Model of your TV / electronic device to help others can find this post!

Warning:  Attempt at your own risk!  Safety First! Always wear protective gear when working on electronics.  Safety Glasses, Gloves, etc…  Remove Electricity from the device (unplug) to Avoid Shock!

 

Again, attempt at your own risk!  This will void your warranty, and possibly damage the board.  I have only tested this on an LG 42DL550!  Other readers have had success on different models so search through the comments.  I would only try this if the TV is unusable and you have nothing to lose!

 

Keywords:  Samsung, Sony, Vizio, Sharp, Sony, Insigina, Toshiba, JVC, Philips, Magnavox, Sanyo,  Fix, Electronics Repair, Motherboard, Mainboard, ControlBoard, CPU, ReSolder,

467 thoughts on “LG LCD TV 42DL550 Fix

  1. So, I’m back to the crime scene. On previous episode hdmi didn’t work, I baked the board and they came back to work but after 2 months they stopped working again. I didn’t do anything for about a year. Now, yesterday the screen went completely black. Leds showed the normal on-off behaviour. So, back to the oven, this time i cooked at slightly higher temp: 7 min. at 190C and 3min. at 200C. I let it cool off gradually to avoid thermal shock to components.
    And like magic the screen is working perfectly and as a bonus also the hdmi came back.
    I just hope this fix will last..
    Thank you
    Oded

  2. Glad I found this site to fix my LG 55LE5500…
    Talked my wife and son into assisting me on the exercise.
    Worked like a champ…Baked at 385 for10 minutes—waited 45 minutes.
    Reassembled and had an issue with “ribbon cable”…white lines on the right side of TV.
    Had to re-connect the ribbon cables and all is back to working order.
    Spent this morning reviewing replacement TVs…no need now.
    Thanks Zedic!

  3. The TV model LG42LE8500 – from January 2011
    Same problem here, HDMI connections stopped sunddenly. I have treid to disconnect all cables and connect them again. Nothing workt here. Then I found this article:
    I baked the board for 12 minutes at 215 degrees Celsius. Maybe a little to long and to warm, because plastic connections melted a little bit. So be carefull here!
    But It worked perfectly. HDMI is back and no weird sound anymore.
    Thank you for a briljant fix post !!
    Timo

  4. I own an LG 46 inch tv made in 2010, all my HDMI ports went out. I used the component outputs for a while, THEN those stopped working. Then I found this website, Thank you so much for this fix. I did it and it worked, 385F for 10 mins…..all HDMI ports work.I just had twins and did not want to buy a new tv. Thank you for posting this wonderful tv fix it person & God Bless you.

    PS…..FU LG!!

  5. This just saved my sanity. It’s less than a day before the Super Bowl, and as of two hours ago I had a TV that could stream Netflix and do precisely nothing else. All four HDMI ports were dead. 10 minutes at 385, and I’m back in business. Crazy.

  6. Zedic, you are a gentleman and a scholar!
    Last week my LG 37LD490 television suddenly decided to fail in the same way as most people commenting here. All 3 HDMI ports wouldn’t work. The TV would turn on and display all the menus and setup etc. but the HDMI channels showed the rotating ‘no signal’ cube. The Antenna, USB port and component ports all worked ok though. The TV was manufactured in February 2011.

    After some Googling I quickly discovered that it is a VERY common fault with LG LCD tvs built in 2010 and 2011. Not many people have had success taking it up with LG. Which is poor on their part to say the least. It’s clearly low quality manufacturing that is at fault.

    Anyway, I Googled some more and ended up here via ‘toms guide’. I took the back off my TV and got the part number off the AV board. I then called a whole load of TV repair shops and parts companies – needless to say the part is out of stock everywhere as the demand has been so high.

    So I decided to follow your advice and promptly baked my AV board.
    I followed your instructions to the letter – AND IT WORKED LIKE A TREAT!

    I decided not to disturb the board – so just switched off the oven and opened the door to let it cool for 45 mins – just to be sure.
    I’ve never smelt anything quite like it. Funky sells it short! Sent the kids outside – doors open, windows open.

    Anyway, THANK YOU so much. You have saved me the cost of a new TV.
    The least I can do is buy you a beer. Do you have a Paypal account?

    All the best,
    Matt Stat
    ENGLAND

  7. First time i baked my 42LE5500 digital board, hdmi input worked for a month. After 6 months my tv stopped working also on digital and analog tv input (antenna). This time i went to service but they didn’t have a replacement board so i baked it again with 200C 🙂 Now antenna works but hdmi has no audio. Better than nothing.

  8. Woke up this morning to find that the four HDMI ports on the 60″ LG Plasma 60PX950 (mfg’d 10/2010) no longer worked. After some tinkering, I found that I could get the analog inputs to work, and that the TV still detected good HDMI signals by undimming the inputs correctly on the input screen, without the HDMI ports actually working.

    About a week ago I noticed that a red stripe running from the top to the bottom of my screen, just left of center, had returned after a six-month hiatus. This all seemed like micro-cracks in the solder, and reflowing seemed to be the only good fix.

    I did a little snooping online to see how others have done their “kitchen reflows” and most followed a similar processes to that shown here, but none were more clearly explained than here, IMO.

    So, I decided to try the bake out / reflow. It worked. The whole process was less than one hour of work. I did it in a toaster oven in the garage to keep the fumes out of the kitchen. The thermostat on the oven is too crude for this, so I used a k-type thermocouple to monitor the temperature. At first I thought that I might need to adjust the time and/or temp of the bake out, but it worked just fine at 385°F for 10 minutes.

    Good work!

  9. Yet another successful story:

    My LG 60PZ550 purchased in March 2011 suddenly stopped working as well any other story here.

    Just followed ZEDIC’s instructions and just after 12 baking minutes I had my TV working again, amazing! Simple unbelievable.

    Thank you so much!!!

  10. I was so disappointed when my HDMI stopped working on my LG 37ld490. So I searched on line and found this fix. Like many I was sceptical about baking my mother board so I looked for a new one and found that no one has one in stock. I looked at buying a new tv… I asked the question to professionals and they said don’t be stupid! Well I was stupid took the board out, sat it on some cardboard and heated up the oven to 200 then popped it in. Ten minutes later and after cooling popped it back into the TV.
    AMAZING IT WORKS AGAIN!
    THANKS TO WHOEVER FOUND THIS OUT AND THANKS FOR SAVING ME A FEW QUID. At least now I know I need to start saving for a new TV and possibly not a LG…

  11. This is unbelievable.. though i read about this couple of months back when my TV stopped working all of a sudden..i never took it seriously.. tried multiple options and finally as the mainboard was not available any where i thought ok what the heck let me try as i was planning to buy a new TV…

    Preheated for 350 degrees and backed the Mainboard for 10 minutes and let it cool for 30 minutes and then connected back…. Zoom everything is working as new…..

    Saved from purchasing a new TV… thanks a lot….

    Being an electronics engineer i was not really buying in to this idea… but you know what…….!!!! i have a working TV with this method… thanks once again…

  12. LG 47LX6500 HDMI ports suddenly went out. Baked at 385deg for 10min worked like a charm. All HDMI ports are working great!! Truly amazing that LG has such a major issue with these models and will not pay for repairs. Any handy man can DIY this for free and have the tv back like new. Thank you for the info!!!

  13. I wanted to followup my post of August 15, 2015, when I baked the main board for the first time.

    Two days ago while I was watching my LG 60PX950 plasma TV, the screen suddenly went purple and green, then black, and then it displayed the lost HDMI connectivity signal again. This time, I was unable to resurrect it with the baking method (two different attempts), and the TV is now non-functional.

    After I gave up on these repairs, I removed the large heatsink located in the center of the main board that covers the main surface mounted IC and was interested to find two 4-5 mm beads of solder on the top of the main board at the edge of the IC. I couldn’t find a replacement main board anywhere in the internet, so it looks like my TV will be taking the long death march to the electronic recycling center. So sad! This fix was great though for the six months that it worked.

    Needless to say, I’m not looking for a LG branded replacement TV! I don’t understand why LG doesn’t manufacture replacement boards any longer, as it seems a shame to throw away an expensive and nice performing TV that would work fine except for the lack of parts. Sorry for the rant!

  14. Problem with 2011 LG 50PZ550 plasma. I had the same HDMI issue, no connection on all three ports. Can’t believe it but it worked for me. 10 minutes at 390 degrees. Let it sit for about 30 minutes, re-installed and now HDMI ports work.

    Hopefully it works for a while. LG what is the deal?

  15. You are a wizard.
    Cooked the main board of my 42LD550 for 10 minutes @ 385degrees. TV is working fine now.
    I forgot to remove the plastic panel from the side inputs – turned it into slag. Oops…
    BTW, date of manufacture was 12/2010.

  16. Worked today 50″ LG Plasma died couple days back.

    Seems like LG made these to die after certain years or however they manufactured PCB – had inherent flaws with soldering.

  17. One more success story for LG 55LE5400 from Aug 2010 model.
    Heating Media board at 385F for 10 minutes did the trick.

    Some where I read that the cause of circuit board issue is due to extreme fluctuation in temp where TV is located.
    I will move TV to more regular temp location (away from AC/Heater or external wall) to see how long this fix last.

  18. I have a 47LV5400 from 2011. TV was fine and then the picture and sound went out in the middle of a TV show about a month ago. Front LED was solid, power board checked out fine, and the service manual troubleshooting flow chart suggested “replace main board”.

    I saw a recent Youtube video referring to this posting. Rather than baking my motherboard in the oven, I put the CPU under my halogen desk lamp bulb (~2cm away) for about an hour. I had a meat thermometer next to it, and it never exceeded 260F so I wasn’t hopeful. I was going to get a cheap Harbor Freight heat gun tonight, but I decided to try the mainboard in the TV just in case.

    It’s working again! I removed the (silicone?) pad from under the heatsink, cleaned it, and put proper CPU thermal compound (Arctic Silver) in there. Hope it lasts a while! If not, I’ll get the heat gun and give it another shot.

  19. I also had the same problem with non working hdmi ports on an LG 47LE5400. I tried the motherboard bake for 10 minutes at 385°and cooled for 30 minutes, when i put tv back together and power on, all lights come on but all i get is a black screen. Seeing all the success stories, did i do something wrong? Any help would be apppreciated. Thanks

    1. It’s possible you have bad luck, and it’s toast, but I would double check all the ribbon cables, and other connectors. Most of the time when you have no picture, it’s because something is not connected correctly. Good luck!

  20. I stumbled into this website while looking for answers or advice regarding HDMI port failure. Having worked on and done some ridiculous fixes on PCBs, I was really interested in the advice given because I’ve never cooked a PCB before to attempt to fix a broken track. Having worked offshore for a long time, with only limited spare parts, when something goes wrong, you have to at least try to fix what you have. My old LG 42PX5D is quite different (PCB & connectors) to the image on the site. Apart from “standard” type connectors, to release the board, with HDMI ports, there are 4 ribbon cables. However, I got the PCB out…looking like new, baked in the oven for 10 mins @ 385 F….and when it came out looked “over done” / burned. Reinstalled in the TV I had no picture…nothing…and thought I’d completely screwed the PCB. Next day, looked closely at all connections & one ribbon cable was not engaged correctly. Relocated it, powered up…picture back to normal….connected Mac to HDMI #1 and then #2….and both working!! Whoever thought of cooking a PCB as a fix….I take my hat off to that person….and have to say, I love results like this that require thinking outside the box. Thank you.

    1. Jonathan, I don’t know that this will help…but the 4 ribbon cables on my TV were connected between the board I wanted to remove and the one adjacent to it. 3 of them were close together and short…maybe 3 inches long, but the central one had the 4th ribbon running over the top of it. The fault or error I made was with the lower ribbon…i.e. the one that was covered or bridged by the other. To even see the mistake I needed a magnifying glass. 75% of the ribbon was in place but the other 25% was out of alignment / not engaged correctly. My eyes ain’t what they used to be!!

      I had reinstalled the PCB / put TV back into working order except deliberately left the main back panel off…so that I could still access or check the connections…and it was midnight / 1am at that time. I made one small error but double checked ALL connections / both ends of everything, in the morning and found my mistake….not on the PCB that I cremated in the oven…the fault was on the end of the ribbon connection on the adjacent PCB.

      In between test failure and locating my error, I’d already priced up a replacement TV…but looked closely enough to find fault in what I’d done and questioned why I had become worse off (picture-less +++) than when I began (only 2 HDMIs not working).

      Finding the fault was fortunate…I could so easily have missed it…but the mistake was mine…I knew I had disconnected the other end of that ribbon when I was trying to disconnect from the PCB I wanted to cook…luckily I found my mistake…I hope you find your solution.

  21. My parents LG 42LD had the reported issue: No HDMI signal from neither the 3 HDMI ports. Everything else worked perfectly. The TV recognised there was an HDMI connection, but reported “No Signal”. A replacement board is £69.99
    The TV is out of warranty (purchased in 2011), and so spending that much money couldn’t be justified when a new TV with warranty only costs a bit more.

    I told my parents about this method and they laughed with fear! The logic behind this makes sense, but as can many online jokes.

    I’m very thankful to report that not only does this work perfectly, but there instructions are fantastic and simplified the whole process. THANK YOU!!!

    It took just over an hour, with 40 mins spent letting the board cool down.

    I cooked my board at 210oc for 11 minutes on a plate, then once done I took the plate out and left it on the work top to cool down.

    Re-assembled and hey presto!! A fully working TV.

  22. My LG 42LD550 TV began to flash on and off with the speakers popping like crazy. This was the first site I looked at and thought it was a prank. But, read the comments and decided I had nothing to lose. It was tedious getting the board free, but not difficult at all. I used cardboard on a cookie pan, and went with 400 F and 15 minutes. I opened the oven and set a fan 5 feet away to help cool the board down (45 minutes). I didn’t trust moving the board and jostling the liquid solder. A little smoke was seen coming off the board as it cooled, but no bad odors. I reinstalled everything, and TV seems good as new. Thanks so much for taking the time to explain this procedure so thoroughly. Note: Unless I missed the warning, one thing that is important to do is to ground your body to the TV chassis before touching the circuit board. A static electricity spark can fry some components, and making yourself electrically identical to the board will prevent that. After baking, only touch the copper screw-hole area at the edge of the board to dissipate static electricity before handling and reassembly. Thanks again.

  23. Well I wish I had found your site a few days ago. My LG 47″ TV switched off last week or at least I thought it had switched of then I realised like everyone else I had no inputs. After spending an evening messing around with different HDMI leads gave up and ordered a new TV.

    The next day I started searching around the net for reasons why thats when I found your page. The theory was good but what about those plastic parts on the board? Well in for a penny as they say. I laid the PCB on a larger piece of cardboard with the heatsinks downwards, and made it level with some extra card.

    I baked it for 10 mins at 196C all the plastic parts were fine, however I did remove the long plastic trim. I let the board cool down and then rebuilt it all.

    When I switched the TV on I had white lines, from reading a post above I realised that one of the ribbon cables was not inserted correctly, once I sorted this out IT WORKS!!!!

    Well thank you very much I guess this is a bedroom TV now.

  24. Model: LG 47LH50
    HDMI not working (no signal)

    Called LG customer service, they laughed and told me the cost would be $200 something plus extra repair fee.
    I refused to pay they for their faulty product, so I baked it for 10 min and all HDMI ports came back again.

    Will never buy another LG or any Korean product again, for sure.

  25. The sweet genius of the internet has triumphed!

    Just baked my TV board from my LG 42LD550 (2010); IT WORKED!

    A few weeks ago, my HDMI was showing no signal. Through my initial search of the internet I found that a new board for my model TV would cost around $260. I also found a couple mail and repair services running around $140. I had been putting off the repair to save money, but today I was set to make my decision.

    As a last resort, I made one last internet search and came across this article (directed from the Tom’s Guide forum). After reading all the success stories, I was convinced I had to try.

    I’m astounded that it worked! I set my oven to 385F and baked it for 10 minutes. Once it cooled, I reassembled the TV and plugged in the Chromecast and BAM – back in action :).

    A few notes if you’re going to try this:
    1. Make sure there is plenty ventilation in your house (kitchen especially); the fumes gave me a bit of a headache.

    2. The cardboard causes some brown sticky residue to accumulate underneath the board; Not sure, but maybe a baking sheet and parchment paper would have been better?

    3. Board came out a little warped from not sitting totally flat on the cardboard; keep it flat.

    Thanks Zedic! And thanks to all the success stories!

  26. I have a LG 42″ LED: 42LE8500 model and more or less the same case as described in this blog. Bought it in 2010, last October all my HDMIs stopped working. I saw Zedic’s solution in this post, but afraid to lose completely the TV, I didn’t follow this procedure and I bought a HDMI/RGA converter and went on using RGA connectors.

    But last week the RGA, YPbPr connector stopped working, and considering there were no options to buy a new motherboard (and I was not really willing to give extra credit to LG technical support :-(), so I decided today to follow your procedure (still a bit sceptical, I must say)… and YES, IT WORKS!!!!!!!

    So thanks again Zedic, you saved a lot of TVs as I see in this blog. For the ones having this problem just to say I left the board 11 minutes at (following my oven thermometer) 200ºC.

    Again, thanks for sharing…

  27. I have an LG 55LX9500 whose HDMI ports worked intermittently in the past few months. Recently they just stopped working all together. When I came across this post I just felt that I needed to try it since I had nothing to loose. The instructions in terms of removing the board was very clear. I must say though that I was worried that when the solder starts melting during the board baking, the surface mount components would just fall off the board. I went ahead and baked the board anyway. Thanks to Zedic my HDMI ports are working again.

  28. This was absolutely amazing! I came across this website 6 months ago and had my doubts this would work.

    First off, my LG 55LE5400 (2010 ) stopped working around 8/15. No picture, no sound. Finally got the guts to just try it out after reading comment after comment of this working.

    Popped out the main board with ease. 10 minutes @ 385, presto this mother works like new again! !!!!!

    I almost spent $500 for a shop to repair it. And to order a new board was around $200.

    My hat tips off to you capacitor cowboy / electric eddie. This was bomb.

    Peace.

  29. Great tip! This is unbelivable!
    I bought my LG lcd tv two years ago from a duggy guy who didnt tell me that tv had problems with turning on and off.
    The problem was that if u turned tv on then it hanged on LG screen or blackscreen and the trick was to wait and let it be on for 5 min average then turn it off and on again. Then it did work. So everytime i wanted to watch tv i had to turned it on and wait and play with my smartphone.
    I brought it to a tv repair shop and they said mainboard is damaged and it need to be changed. Costs 300 euro average.
    Then i thought i just keep it like this till one day i will buy a new one.
    Until i found this website.
    I did exactly follow the instructions and i cant belive this! TV IS WORKING GREAT!!! No more waiting and its turnin on and off perfectly!!!
    The only different was that when a black screen appears then i see on the left screen a light black part but when its not black u dont see that and after i played with colours even thats gonne completly!!!
    And another thing!
    This tv LG42le8500 had a know issue with vertical gray lines.
    Now is even that issue solved!! Hahaha i am so happy with this website that i want to even pay him! Thanks !
    Ppl try this it worked 100% for me!!!

  30. The wife thinks I’m a genius! Per her words, “this is going to end badly.” Well, it didn’t AND this hack WORKS. I have the same LG LD42-550 model and had the same exact problem- one day all four HDMI ports go dead. Followed the instructions exactly and BINGO all four ports are up. So, well worth the $10 that I gladly sent your way. Many many thanks and finally, that’s the LAST LG TV I’m buying!

  31. My LG 42LE5500 had a similar problem, can turn it on but no picture at all. Strangely, responding to remote control as i can see the indicator LED is blinking.

    Wanted to try the baking method but I have 2 young kids. Will the fumes/smell generated by the baking harmful to the young? and will the smell linger in the over forever (my wife won’t be too happy if so since the oven is brand new .. ).

    Your advise/sharing will be appreciate.

    Tempted to buy one brand new board from the china market but not sure how reliable it is.

    Rgds.

  32. I tried it *twice*. Didn’t work for me. My HDMIs work with Chromecast and my Stick PC(both USB powered), but not my Xbox360.

    Finally got a powered ‘HDMI repeater’, a $8.53 device on Ebay. My HDMI is back, so is my Xbox 360!

  33. I had my Lg Tv since Sept 2010 and it just went out this morning March 30, 2016. What seems to amaze me is that my daughter has had her Philips Tv since 2006 (10yrs old) and my son has had his Polariod Tv since 2007 (9yrs old) which both Tv’s seems to be working like new; my smart Tv goes out in only 5 1/2yrs. Is LG really a better brand to chose over other reliable and inexpensive Tv’s? However I used Zedic advice and followed step by step instructions to repair my LG and thus far thumbs up. It has only been working for a couple of hours so I will give an update in about one month. I pray it’s great news.
    Thanks ZEDIC!!!

  34. I was given a broken LG TV as I’m a computer engineer. I did the bake process at 395F/201C for a slightly higher temp as the board was clearly marked lead free. One additional thing I did was remove the metal, plastic, and shielding parts from the board as they are more sensitive to heat. Baking worked like a charm. I set on a cardboard box to give air circulation all around. Thanks for the idea!

    Note: Be sure the cardboard box does not use adhesives to hold it together. They will melt and outgas.

  35. A few months ago my grandparent’s LG TV picture scrambled and they tried arguing with LG to fix the main board since it is a “known issue.” Well, of course, they didn’t want to help with anything. Tried this today and it worked like a charm! We were very skeptical, but the picture came right back. Thank you so much for this!

  36. This worked like a charm for me. My LG TV worked perfectly for 5 years and one day suddenly all HDMI ports stopped working with ‘No Signal’ issue. I was almost ready to buy a new TV before I came across this blog. Thanks a lot for this. I also left a 10$ donation as super thanks to zedic.

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