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 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.
- 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!
- 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,
Hello,
I have here in France a LG 42LE8500 from 2010 with the “famous” LG HDMI problem = the 4 HDMI ports fail with “no signal” message. No warranty by LG support service… so I decide to try your incredible solution.
The moterboard got a 12 minutes at 200 degrees in my oven… and Well Done !
For the moment all works correctly with my 4 HDMI ports working.
For french people I put also my comment in french.
Thanks a lot !
bonjour,
j’ai un LG 42LE8500 de 2010 qui a le problème des 4 ports HDMI qui ne fonctionnent plus, avec le message “pas de signal” “no signal”. L’appareil étant hors garantie et aucune solution ne m’étant proposée par LG, j’ai décidé d’appliquer cette technique étonnante de “cuire” la carte mère pendant 12 minutes au four à 200 degrés.
Étonnant mais ça marche, il faut bien sûr faire très attention en démontant et en remontant la carte mère.
Je verrai sur la durée comment ça tient, pour l’instant parfait.
Merci.
Worked like a charm for my LG 42ld750. All HDMI inputs had stopped working, baking the mainboard fixed them all. The TV is back to normal now. Thank you!
We couldn’t believe it but it actually worked. We actually have a different model, the 37LH55, and the board looked a little different but it worked anyway. We weren’t able to remove a few plastic components, but I think it wasn’t in the oven long enough to melt any of them. Really crazy, thanks so much for posting this!!
I thought this was crazy science fiction when I first read about this motherboard baking, but it worked on our LG LCDTV! None of our HDMI inputs have worked for months, and we had been connected to a cable box through old school RCA plugs. A few days ago the LG logo and clock were all that would boot up. We hated the idea of throwing away a television that was supposed to be so darn smart. Gladly, we came across your post. Thanks so much for the help. Ingenious.
Thank you so much for this blog post! The baking fix worked for my LG 46LD550! It was purchased in 2011 and a couple weeks ago first experienced the HDMI failure (which from Googling seems to be the common trend lately for the 2011/2010 models). I was baffled as it would recognize my cable box but none of my other devices, but now that I’ve done this fix, it works again. Glad I tried this before shelling out $200 for a new main board or $1,000+ for a new TV.
Hi Zedic, I am Leo from Argentina. I read this post a few weeks ago when my LG 32 LE5500 had the same issue that you described. I bought it in October 2010.
I tried this solution, I followed step by step and it worked perfectly just like you said. Muchas gracias! (Thank you very much).
Regards!
Leo.
I tried the baking method (I have a LG 32LD490 and it didn’t work (oven was at 190C) – some of the plastics on the motherboard melted, and when I turned the TV back on there was sound but no picture. Maybe because I have a fan-assisted oven, the temperature should have been a little lower. Looks like a new TV purchase for me, and this time definitely not an LG!!
It worked like a magic on my 42 inch LG LCD TV. Thank you so much for this posting. I almost throw my TV away. I thought to give it a last try. It worked. Thanks again.
Tried this today .. did 385 degrees for 8 minutes and 400 at 7 minutes. Took it out and let it cool for 30.
All hdmi ports work mint. Thank you!
I have an LG 42LD550. One day I tried turning it on and the status light at the bottom just faded on and off with red light. I just baked my board for 10 minutes at 385° letting it cool in the oven with door open. It helped. We got the screen to turn on but only the right half worked on the screen. The left side was white lines. Unplugged, then unplugged display ribbons, plugged them back in and still the same. After 3 times it went back to the red flashing status light and no picture. Baking again for 15 minutes. Any idea why it quit again or why only half the screen worked?
Yet another success story, LG42LE8500. All HDMI ports dead, 10 minutes baking at 200 degrees celsius, assembled and worked again. Only concern which I had was, that the motherboard was a little bit bend from the oven. Since the bottom is not even with a few pieces standing out, I used two wooden blocks left and right to put the board up, however then it started hanging through, when warming up. Not too bad, in the end it creaked a bit, but working fine now for 1 1/2 hours. Watching “Die another day”, so hopefully this will be also the theme for my TV.
Hi,
I had HDMI problem with my 42LE5500 and tried the baking method as you instructed, installed the card again, this time there is sound but no video. Should I bake it again? Or is it a different problem this time? Before baking there was “no signal” sign, now light comes and nothing.
Thanks in advance…
Greetings from Finland.
All HDMI inputs died from my 05/2010 manufactured LG42LD650. 10 minutes in 200C and it works again. The disassembly was also very easy.
Thanks for the advice!
Had to log in just so I could comment and say Thanks! I have an LG55LD that had crapped out last night. Did exactly as your instructions state (took me about an hour from start to finish) and it is back and working today! Awesome! (Mostly….half of me wanted to buy a new one :-).
LG 42LD560 fixed! Thank you.
We had the ‘stuck on LG logo/clock screen’ issue. 2010 model, failed in 2015 so thought we had a pretty good run. I found your instructions, baked the board and away we go! Mind you, will start researching new TVs as I think we are probably on borrowed time with this one anyway. Interestingly the problem occurred after we had a 38 degree Celcius day and a very cool night – so the expand/contract idea was probably the cause.
Thanks again.
It works!
My LG 55LD650 failed for all inputs (av, usb, net, hdmi, etc.) and the sound became extremely slow and low. Warranty already expired and the local LG support advised that there may not be spare part for this old model (manufactured late 2010).
Thus I tried the baking method exactly as Zedic demonstrates.
After the 10 minutes baking and another 1 hours for cooling (I left the board in the oven and keep the door open), I fixed the board back the connected for a test run.
It worked! So amazing!
Thanks a lot to Zedic and wish more people could know this great method.
Cheers！
Luis from Hong Kong
Hello I just want to say thank you very much I did this in may lg 42 dl550 and is working like new very happy thank you
Thank you! You saved me at least $600. My wife and son were skeptical to say the least. But baked the board @ 380 Fahrenheit for 10 minutes, took it out of the oven, ran some errands, and then came home and reinstalled the board. PERFECTION!!!!
Wow! Un-be-leave-ah-ble ! My HDMII ports stopped working on my LG Model 46LD550-UB Factory date 2010 (I was blaming Comcast.. thought I had a bad cable box) then read this on the internet and decided to give it a try. Holy smokes… you nailed it, perfect root cause (hairline cracks on solder joints). Followed the perfect instructions, baked the mother board and like magic … HDMI ports now working again. Thanks ! For those of you who have this problem… pay close attention to the instructions- all the connectors/disconnections come off easily and smoothly if you press or pull up on the right places -DONT FORCE ANYTHING…if you do, you are doing it wrong and you will cause damage and not fix your problem.
Thanks – very much! This morning I realized all the HDMI, component video and antenna ports are dead although LG logo and menu are working. The TV is LG 42LE5500. Tried this “baking” method – 10min, 200C – now (for the moment) TV is working fine. All the ports are working. Thanks again.
I had 47LE5400 with black screen when powered on. I baked the board for 10 mins at 380 F, and the TV works now. Thanks to your post.
WOW, I tried with my failed LG 3D TV Main board, after the LG CC informed that the company has stopped supporting spares for this model and I need to buy a new TV. The old TV has only 15% value after depreciation which they would buy back, which is peanuts.
After baking for 10 min at 200 deg C and cooling to 30 min. connected back the TV and is back to life including the LAN port which failed earlier had started working.
Could not believe that my TV is salvaged. Thank You for the Great idea.
My lg 42lw5700 (purchased 2012) was not working since may this year. The power led just blinks slowly when power bottons press to on…suspecting the main board is the problem tried bake the pcb board for 10 minutes at 200 °C.. Perfect my lg 42LW5700 now working again.. Thanks lot saves me 6K Pesos for board replacement..
WOW,,, THANK YOU SO MUCH,,,I BAKED THE HDMI BOARD LIKE YOU SAID AND OVEN COOLED AND SURE ENOUGH I INSTALLED IT AND IT WORKED LIKE A CHARM,,,,YOUR THE BEST,,,,,, HAPPY HOLIDAYS TO U AND YOUR FAMILY MY FRIEND,,,,,
MICHAEL
Mine is dead, I tried your solution and it dosen’t start anymore… thx but no thx!
Worked !!! Baked my board 10 minutes 200o C. Put it back and Ualaa … tv is not freezing anymore !!!
Thank you !!!!!!
Right, so, I’m sure this worked for a lot of people, but he isn’t kidding when he says be careful taking the board out. I had it resting nicely on a cola cardboard box but as I was taking out the cardboard the PCB board slid a bit and a bunch of little metal boxes (that used to be soldered on until the soldering melted) slid right off the board and I have no idea where they go, so, yeah… it’s a brick now.
Recommendation: definitely do the open over door technique to slowly cool the board WITHOUT moving anything. The reason I didn’t was the gross smell of the cola cardboard belching when I opened the door, I thought I’d just expedite the process and now I need a new TV.
I had the same thing occur a few weeks ago. I tried it out today and it totally worked like a champ. 385 for 10 minutes, cooled in it the oven, put it back together again, and my son is playing Destiny in 1080p again – a Christmas Miracle!
I can confirm this method worked on my LG32LD490 tv, as of yesterday all of my hdmi ports stopped working, i had bought the the tv back in late 2010 and after doing some research online i realized that this is a common problem with LG sets manufactured in 2010/11.
After reading the fix described on this page i first decided to try all the usual stuff of unplugging the tv for 15 minutes, turning it back on, resetting it back to factory settings but was all to no avail, none of that worked, i was still getting the ‘no signal’ logo on the screen,
I have to admit that the idea of baking the motherboard in the oven seemed just a little too far fetched for me but after reading so many of the comments from people who tried this and claimed it had worked for them i eventually brought myself round to giving it a go, i took the back cover off the tv, pulled all cables from motherboard, unscrewed, took it out and placed it in preheated oven at Gas mark 5 (375F) for 12 minutes, it did kinda smell a bit, then i turned off the heat and let it cool for 1 hour with the oven door left open.
When i came to reassemble the motherboard the only problem i had was i found that the ribbon cable had to be pushed fairly hard in to the slot before pushing the plastic clip back down to secure it, it took a few attempts to get it to clamp the cable in tightly, i then powered the tv on again and ‘Hey Presto’ all the hdmi ports are working again, i just hope the fix will last for a long time to come.
I would say to anyone who feels confident enough in carrying out this procedure to go ahead and give it a go, of course it should only be used as a last resort if all else fails, good luck.
Worked perfectly. i was really scared about this, but it really works.
Worked very well
Thx a lot
Good morning everyone,
I was really astonished to watch my HDMI ports alive again! It works perfectly!
My TV is an LG 32LD750.
Thanks a lot!!!!
THANK YOU for this, tried last night on my LG that had lost HDMI (2010 Model) and it works again. As said i put it in the oven on 200 degrees C for 12 minutes, it did smell ‘Funky’ and i let it cool with oven door open before moving the board.
Great work mate
My 32″ LG was stuck on the startup screen/Logo last night. The tv has worked great for about 3 years. I checked around the internet to see what I could do and noticed that a lot of other LG owners were experiencing the same issue but did not have any solutions to give. Fortunately I came across this site and all of the comments of people who have had success doing this. I figured what the hell, what do I have to lose, the tv isn’t working anymore anyway. So I followed the instructions given. It was extremely easy to do by the way. I preheated the oven to 385 F. It took me about 20 minutes to get it apart. Threw the motherboard in the oven on some cardboard and set the timer for 10 minutes. Timer went off and I pulled it out and set it on the counter and reset the timer for 30 minutes to let it cool. Timer expired and put the motherboard back in the tv and put it all back together (took about five minutes now that I knew exactly what to do). Plugged the tv in and powered it on. Voila!!! It played perfectly like it is supposed too! Checked it again this morning just to be sure that all is good and it started right up. Thanks for the post and all of the comments. If you’re having the same issues with your tv, do not give it a second thought, use this method, it works!!!
I had to signup just to say THANK YOU!! What a great fix!
It worked like a charm for my LG 37LD650 which had all 3 HDMI ports out of use.
It wasnt specified in the instructions, so I **pre-heated** the oven to 200C and cooked for 12min. Let it cool for 30min in the oven with the door open. And voila, everything works 😉
47LE8500
200C° pre heated with hot airflow in the oven! 10Min 30Sec
Let it cool down in the oven 6 hours.
Everything works fine again!!
Thx a lot,- it’s awesome! Greetings from Austria
Fixed mainboard on LG 42LE550A by baking it for 10 min 210 degrees celsius today .. Symtoms before baking : no signal on all 4 HDMI ports , flickering screen , noise in speakers first 2 minutes when powering up. reconnected main board , got picture on only 1 half of the screen , The problem was one of the flat cables to the display. aligned cable 100% and locked the cable again , now it worked 100% , all hdmi ports ok , perfect picture, no flickering and no noise in speakers . FANTASTIC !! Thanks for sharing the baking metod , it worked just fine for me!!
I have an LG 55LE5400 purchased in 2010. The TV works with all ports and antenna input but none of the HDMI ports were working. They would sense something plugged in and then go to the spinning cube NO SIGNAL. Every once in a while, they would work for a minute then go out to NO SIGNAL.
I NERVOUSLY baked the motherboard at 385 for 10 minutes, then let it cool. Put it back in and put it all together and… WOOHOO!!!! it worked. All HDMI ports work now… Amazing.
Thank you.
I tried it twice. 1 shot 10 min. 385 and another one 15 min. 425. Didn’t work and all my HDMI ports are dead.
I got my LG PX950 60″ 3D plasma working! I tried the motherboard baking fix and it worked! I had no sound at all and none of the HDMI inputs worked. I baked the MB for 12 minutes at 385 degrees, turned the oven off, and then let it cool in the oven with the door open for around an hour. After I reinstalled the MB both the sound and the HDMI inputs now work. The hardest part was getting this heavy TV off the highly mounted wall mount and back up. The back cover comes off easily (lots of screws) and the motherboard connectors are easy to remove. The trickiest cable to remove is the ribbon cable. You don’t pull it out until you release the top catch. Google “remove LG motherboard ribbon cable” for a video that shows how to do it. I think the video I watched was for a samsung but its the same type of cable.
Knocking on wood that this fix works for at least a few more years because I really like this TV!
Thanks!
My HDMI inputs are still working but the audio went out again on the TV. I have to use the audio out on the cable box. I’ll really glad to have the HDMI picture back but I don’t have high hopes for it being a permanent fix.
We are done buying LG anything for ever! We had an LG French door fridge that was also junk.
What a great fix! My next door neighbor had put out her LG 42LD550 at the curb with a note that said ‘inputs do not work’ . I took it in the house, hooked it up, and verified that indeed, none of the inputs worked; and the tv made a horrible squealing noise when I turned it on. Google’d this fix, baked the main board at 385° for ten minutes, replaced the board and back cover, and I had amazing picture and sound within minutes! Just like that…a free upgrade from a 32″ Hisense to a like-new 42″ LG. Amazing stuff!
Unfortunately for your next door neighbour she didn’t stumble across this webpage (“⌒∇⌒”)
Hi,
We tried this on an LG 42LD560. It had the red blinking power light problem and would not power on (blank screen). Tried this method, removed mainboard and baked for 10mins at between 220-200 degrees C on a fan-forced oven, resting on baking paper. Checked many times to make sure plastic didn’t melt. Rested in oven with just fan on for a few mins then cooled on table. Re-installed.
Worked beautifully!!! TV powered on and working nicely again.
Thank you so much for posting this fix for the rest of us.
I have a 32LD490 bought in 2011, and all my hdmi ports suddenly stopped working last week. Despite the fact that they clearly have a serious issue, LG were not interested in repairing it. With nothing to lose I decided I would try the baking. Dismantling was really easy and I was nervous during the baking, but I’ve created an account here purely to report that it worked. All three hdmi ports are now working again. The house stinks, but it’s a small price to pay. Thank you so much, you have probably saved me £300!
Hi,
Thank you so much, this amazing fix worked for my 5 years old 32LD650. I had the same problem with the HDMI ports, they stopped working. I was about to buy a new TV when I found this “magical” solution. You saved me a new TV!!!!
Thank you again. Greetings from Chile.
I had the similar issue with my 47LE5400 47-Inch 1080p 120 Hz LED HDTV, 2 days back. I noticed that most of the TV model mentioned in the above post are LD series.. Can I try the process for my TV ?
Also I would like to know if we need to pre-heat the over to the specific temperature lets say 350F and then keep the Mother board in for 10 minutes ? OR just put the mother board in the oven and start the oven for 10 minutes. I will appreciate any bodies answer on this.
i think moisture is the main which cause of corrupt …electronics…….try it…uncover and give dry heat by hair drier…or something else………..it is also effective…..thanks to you …increasing my knowledge regarding your technique…..i have 32 led tv ..after one year it stucked on android logo…..boot logo…..any one have solution
Baking the circuit card worked perfectly on my 55LE5400 TV today. Was somewhat skeptical at first but now I’m a believer. This site saved me from an expensive repair bill and maybe even an unnecessary replacement purchase.
Another success story:
The 4 HDMI ports of my LG 60PZ550 purchased in June 2011 suddenly stopped working. With the warranty expired, I turned to Internet trying to find a solution. I tried every conventional fixes first, with no results. Then I found this post… When my wife ans I first read about the “baking” solution, we were skeptical, like many others. But with all the positive feedback, we decided to give it a try.
We followed ZEDIC’s instructions meticulously, and after an hour of disassembling, baking and assembling, we had our TV working again, amazing!
Thank you so much ZEDIC, you’re a life saver.
Another Success!!
I bought a LG 42LD550-UB.CUSWLH with manufacture date of 12/2010. It worked great for 9 months until all 4 HDMI ports died. Everything else was fine. After sitting unused for a year, I figured I would replace the main circuit board. I found used boards for $50 and up and new boards for $150 and up. I finally Googled the model and the problem and found the TomsHardware reference that brought me to this site. Thanks to the author and the 208 comments, I gave it a try. The board was marked “lead free” so I wondered if 385 F was hot enough. Since it worked for others, I Preheated to 385 F, baked for 10 minutes, turned off heat, left oven door ajar to cool. When I reinstalled the board the next day it worked perfectly. What can I say but Thank You to the original writer and all who commented. Isn’t the web and Google just amazing!!
Registered for an account just to let you know another successful bake ‘n fix. Was very skeptical, but the logic behind the reflow process is pretty well documented. I hope this is a long-term fix and I can get another year or two out of this set. Thanks again to the OP and everyone else who shared their success stories. Thankfully back to HDTV, watching SDTV just made me feel poor…