Repairing a LG L227WTg-pf 22″ monitor – No power

March 18, 2012 by
Filed under: LG Electronics, Monitor Repair 

In this repair guide we will show you how to repair a LG L227WTG-pf 22″ LCD monitor with power supply issues. This model uses the Lien Chang Aip-0165 power supply board. If you have a unit that has no power, a wavy display, is slow to show a picture or just has a blinking power light and no picture then this repair guide should help you get it back going again.

To complete the repair you will need the following tools:
Phillips screwdriver
Soldering iron
Lead free solder
Desolder wick
and then the capacitors that need to be replaced.
Qty 3 1000uf 25v capacitors
Qty 2 680uf 25v capacitors
Qty 1 220uf 25v capacitor
Qty 1 33uf 50v capacitor
Be sure to use good quality low ESR, high ripple current, high temp capacitors or you can damage the power supply board. More information on getting the correct capacitors can be found on our capacitor page.

We sell a repair kit with all of the proper value and size capacitors for $12.00 if you don’t want to worry about getting the correct parts.

Here is a picture of the power supply board with the capacitors that need to be replaced circled in yellow:

Here are videos showing how to disassemble and repair the monitor.
Part 1: Dis-assembly

Part 2: Board repair

Part 3: Re-assembly and testing

This is not guaranteed to solve all problems but in most cases this is the issue with this model.

If you don’t want to do the repair yourself, use the service request link. Most monitor repairs run $35-40 plus return shipping.

Be sure to check out our forums section where you can ask questions about this repair or find information about other topics.

Post a comment below to let us know how your repair went!


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Comments

36 Comments on Repairing a LG L227WTg-pf 22″ monitor – No power

  1. Victor Vess on Sun, 28th Oct 2012 3:13 pm
  2. Amazing – ordered the kit and everything worked perfectly. Thank you for providing such a thorough guide!!

  3. David Santy on Sun, 25th Nov 2012 11:20 pm
  4. So glad I found this guide! I’ve been having troubles with my LG monitor with the power button flashing and taking forever to start up. It would run fine all day after that, but it’s been sitting without starting for longer and longer recently. I thought I was going to have to buy a new monitor!

    Just ordered the repair kit. Thanks very much!

  5. David Santy on Sun, 2nd Dec 2012 6:20 pm
  6. The kit worked a treat! The capacitors are higher quality than the stock ones on the power board.

  7. Leybl on Sat, 29th Dec 2012 11:17 am
  8. Hi,
    In Israel we have 220V power.
    Would the same capacitors be used on the model in Israel? .

  9. CCL_TECH on Sat, 29th Dec 2012 1:32 pm
  10. Yes, the capacitors are the same in all units

  11. Mike W on Sat, 9th Feb 2013 1:25 pm
  12. BACK FROM THE DEAD!!! So glad I didn’t throw it out when it died a year ago. The kit worked perfectly. I didn’t think it would be anywhere near as easy as it looks in the video, but it was–even for someone like me who had never used a soldering iron before. Makes me want to go find some more broken monitors to fix. Don’t hesitate to buy the kit…well worth it.

  13. LTCParisi on Sun, 24th Feb 2013 3:34 pm
  14. I ordered the repair kit but it came with no schematic of the board as to which caps go where. Anyone have a link to info on the board which shows this info?

  15. admin on Sun, 24th Feb 2013 4:59 pm
  16. The repair guide has the picture of the power supply board. The easiest way to do the repair is to remove one capacitor and replace it then go to the next one. The values for each capacitor are printed on the side of the part, just match the old part to the new part as you go.

  17. LTCParisi on Sun, 24th Feb 2013 6:01 pm
  18. Too Late, I removed the caps a few days ago and can’t remember all the correct locations.. dumb I know so help me out please

  19. LTCParisi on Sun, 24th Feb 2013 11:12 pm
  20. I downloaded the service manual online and fixed the problem.

  21. Gene Baker on Wed, 27th Mar 2013 3:42 pm
  22. Great instructional video, you are certainly good at changing the capacitors, but I don’t think I could do the soldering. Do you sell the boards already repaired for the LG L227WTG Monitor?
    Thank you,
    Gene Baker

  23. Gene Baker on Mon, 1st Apr 2013 11:44 am
  24. I think I forgot to check the box to notify me
    by email.
    Gene Baker

  25. admin on Mon, 1st Apr 2013 9:55 pm
  26. Hello Gene,

    We can repair your board but we do not have the boards for sale.

  27. Joel M. on Tue, 2nd Apr 2013 12:20 pm
  28. Got my repair kit in the mail yesterday, along with a starter soldering kit, and ran through the repair instructions last night. This was the first time I had ever soldered anything but your instructions were clear and easy to follow. My L227WTG is working well.

  29. Gene Baker on Wed, 3rd Apr 2013 8:34 am
  30. Well, I guess I am going to dive into it…
    Question… Do I get the starter soldering kit
    along with the capacitors for the $12.00?

  31. Gene Baker on Wed, 3rd Apr 2013 9:53 am
  32. Sorry, I see now where the items are sold separately.

  33. Gene Baker on Wed, 10th Apr 2013 11:07 am
  34. “A Successful Surgery” The Capacitors and Instructional Videos worked like a charm! Everything went Perfectly. Monitor powered right up… after weeks of a flashing blue power button.
    Thank you for a “renewed” LG L227WTG
    I’ll do my second L227 when I get the Flashing Blue Light Of Death :)

    Thanks again,
    Gene Baker

  35. Mike on Mon, 6th May 2013 8:35 am
  36. Hey guys I need your help. Bought the capacitors the other day because my L227WT was slow on powering up. The last time it worked, over a minute passed to fully boot up and show a picture. Anyhow, so I bought the kit, soldered it in and proceeded as shown in the video. Just as I put in the powercord I heard some quit clicks and right after that smoke. At first I thought there was somethign wrong with the caps or my soldering however the broken part is on the dvi-vga diplay board itself. It’s the part right to the huge red/white wiring panel connector with the tag: A1241 Y it blew on the backside.
    I really hope you can help me out or guide me in some direction. I love this monitor and it’be a shame to throw it in the trash.

    Thanks,
    Mike

  37. Gene on Mon, 6th May 2013 4:01 pm
  38. You can find the video board on eBay. About $18.75.
    From China. Used boards but they look good.
    Gene

  39. Keenan on Wed, 8th May 2013 8:04 pm
  40. Wow that was unusual. I just wrote an incredibly long comment
    but after I clicked submit my comment didn’t appear. Grrrr… well I’m
    not writing all that over again. Anyhow, just wanted to say great blog!

  41. Mike on Thu, 13th Jun 2013 5:41 am
  42. Hey it’s me again. Bought a video board on eBay, switched them, as I turn on the screen the same piece blew again. I found a service manual and the specific model, it’s the KTA1241. Even found a chinese distributer who sold me some. Today I solded the new one on the video board, turn on the monitor and bam, there it goes again. Looks like my power supply won’t cooperate with me anymore.
    I asume nobody else head or heard the same problem before? I really love this monitor and would like to see it working again.
    Hope somebody can help me out.

  43. Doug on Sat, 22nd Jun 2013 9:01 pm
  44. Had the blinking blue light and the monitor wouldn’t come on for several minutes. This article was the first one that I looked at after Googleing the problem. I purchased the capacitors locally and followed the video instructions here. The repair was a success. Monitor works just like new. I could see 4 of the capacitors bulging just like noted in this article. Thanks for the quick and easy repair saving me $300 on a new monitor.

  45. Jack on Wed, 26th Jun 2013 9:47 pm
  46. I was removing the outside molding as shown in the video and pulled the wires out for the “ON” Button and control panel for adjusting monitor display settings. Are these circuits available for order/replace or will I have to buy a new/used monitor.
    I found the Service/Repair Manual for $7.00.

    Please help.

    Thank you

  47. Shaaz on Wed, 31st Jul 2013 2:29 pm
  48. Thank you so much ! I did change all the capacitors . And wallahhh ! Work as a charm ! Thank you so much !

  49. Carlo on Tue, 19th Nov 2013 4:10 am
  50. I placed an order like 3 days ago and i still have not moved from processing. It says 1 or 2 business days. It’s been 3. I need the capacitors ASAP, if it took this long i wish the site had a cancel button so i could order elsewhere with more urgency.

  51. Chris on Tue, 3rd Dec 2013 8:03 pm
  52. Ordered the kit, a spare tool and some solder. Fired up the videos on my laptop and ripped my very slow/sluggish to start up monitor apart! I broke a few black tabs around the monitor and a power connector tab but after all was said and done it fired up perfectly when I replaced the capacitors! One more fixed monitor! Thanks!

  53. Darren on Tue, 7th Jan 2014 7:53 am
  54. I used the capacitor kit to repair my LG L227WTS (slightly different model). The power board is identical. Worked like a charm – but it wasn’t easy. In the disassembly video he unplugs a cable at 2:39. On my unit I could not unplug this cable. It didn’t have a latch holding it in place but it wouldn’t budge. Somehow in the video this connector pulls out effortlessly for him. This may be a difference in some models. This made disassembly and reassembly much harder.

    Also, I ordered the 30 watt soldering iron and solder from their store and I feel the iron is very, very cheap and can barely handle this job. Removing the old capacitors was possible but took longer than shown in the video. With the cheap 30W iron it takes much longer to heat up the leads. Cleaning up the solder was a pain. The iron could not melt the solder through a desoldering wick. I tried many times but it just wouldn’t work. I used a desolder pump instead. And again, it took far too long to melt the old solder so that the pump could vacuum it up.

    And now the soldering. The 30W cheap iron is complete junk for this. I allowed the iron to heat up, applied it to the contact point on the PCB for several seconds, then applied the solder.. and nothing. No solder would melt. If I held it on longer I would get a solder bead and no solder would flow into the joint. Terrible. The only way I managed this repair is when I would get lucky and some solder would attach to the capacitor lead. I could then use the edge of the iron to melt that solder down into the joint. Then I would remelt it to make sure I didn’t have a dry joint.

    I tried to tin the tip of the soldering iron.. but nothing. I would just get solder beads. I appreciate the capacitor pack as it saves you some time and effort on finding the right parts. And the videos were very helpful. However, I recommend you find a better iron somewhere if you are going to attempt this repair yourself. In the end I did manage the repair myself. It took 3-4 hours mainly due to the cheap soldering iron.

  55. Michael on Fri, 17th Jan 2014 9:25 pm
  56. I had the same problem as Darren; the 30w soldering iron was garbage.

    ” The 30W cheap iron is complete junk for this. I allowed the iron to heat up, applied it to the contact point on the PCB for several seconds, then applied the solder.. and nothing. No solder would melt. If I held it on longer I would get a solder bead and no solder would flow into the joint. Terrible. The only way I managed this repair is when I would get lucky and some solder would attach to the capacitor lead. I could then use the edge of the iron to melt that solder down into the joint. Then I would remelt it to make sure I didn’t have a dry joint.”
    (Darren on Tue, 7th Jan 2014 7:53 am )

    That being said, I was attempting to repair a LG2252TQ and read that you could use this kit to repair it. Some of the capacitors were the same rating but others were different. After affecting the repair the screen would now turn on but the picture is incredibly grainy and purple streaks have appeared at the top of the screen…

    I am going to try and fix it again (after buying another soldering iron and correct rating capacitors) Hopefully others have better luck.

  57. Johnny Tarr on Tue, 29th Jul 2014 4:04 pm
  58. great videos, with the exception of the big “BUT FIRST” moment about recording where the different capacitors go. The video states the layout is in the step by step instructions, which I never could find. Here’s what I learned by dissecting my other monitor:
    With the cluster of four at the bottom and the big lone one on top:
    The lone one on top is 1000
    The two on top of the cluster are 1000
    The two on the bottom of the cluster are 680
    The far left small one is 33
    The small one to the right of the cluster is 220

    Hope that helps anyone else that took them out BEFOE learning that you needed to remember the locations.

    Once that was all done, it worked great.

  59. Jason on Tue, 21st Oct 2014 10:14 am
  60. Any particular reason why lead free solder is recommended vice 60/40 or 63/37? I don’t have any lead free solder, and I can’t imagine it working as well as 63/37.

  61. Keith B on Thu, 8th Jan 2015 11:27 am
  62. Worked great. Saved it from the dumpster. Thank you!

  63. Frank Siegler on Thu, 8th Jan 2015 1:49 pm
  64. Great tutorial…fixed as promised…saved the monitor.
    Manufacturers of any product should take note of your excellent customer service.

  65. Martin on Wed, 11th Feb 2015 10:44 am
  66. Wow, thanks a lot!! Costs me about $6, and my monitor is back in perfect shape!

    The smaller capacitor, 33uF, and the 1000 uF one that is alone, were still fine but I changed them anyway.

    Thanks again!

  67. Thomas on Wed, 5th Aug 2015 1:16 am
  68. Thank you so much, ordered the capacitors and the monitor is working again, I have two and working for the last 8 years!

  69. Sean on Thu, 10th Nov 2016 7:58 pm
  70. First, let me say that I have never attempted something like this before. I’m not good with electronics and don’t have a lot of solder experience. Well, I got the power to work again. Haven’t hooked it up to a PC yet but it comes on and screen glows white. :)

    I have to agree, the 30watt soldering irons are crap for removing the old capacitors. I should have spent the $10 more and got a better one. Took me a while (not 5 hours like someone else stated), but a good hour or more. Solder did not want to melt.

    Thanks for the extensive videos. Saved the monitor (not that I was really caring..paid $5 at a yard sale for it…lol..but for $20 I got it to work again and learned something. :)

  71. corburterilio on Wed, 4th Jan 2017 2:55 am
  72. Good write-up, I¦m normal visitor of one¦s site, maintain up the excellent operate, and It’s going to be a regular visitor for a lengthy time.

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