Lg 37lc55

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • junger
    TV Enthusiast
    • Sep 2011
    • 13
    • England
    #1

    Lg 37lc55

    Hi All
    I have had a couple of the same model giving the same sympton on
    LG 37LC55.
    When switched on you get no picture, If the LCD is left on for say 15minutes and then the mains cable is unplugged and reinserted then it works perfectly well. I have looked at the caps on the power board and they are not bubbled/dry.
    Any ideas, anything I can try?
    Thanks
    Junger
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Lg 37lc55

      Bad cap can look normal but it can have high ESR. What you can do is this, heat up the power supply board with hair dryer, then pug in the TV and see if it will come on. ESR will go down when cap is heated up. It sure sounds like bad caps to me.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: Lg 37lc55

          The LG 37LC46, 37LC55, 42LC46 and 42LC55 are prone to four bad caps on the PSU going bad. More Samwha WBs.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • junger
              TV Enthusiast
              • Sep 2011
              • 13
              • England
              #4
              Re: Lg 37lc55

              hi
              which caps are they, so that I can inspect them closer, Thanks for the hairdryer tip, I will try that

                Comment

                • psmedley
                  Senior Member
                  • Apr 2012
                  • 144
                  • Australia
                  #5
                  Re: Lg 37lc55

                  http://www.ohmsupplies.co.uk/LG-37LC...301-REPAIR-KIT

                  LG 37LC55 REPAIR KIT

                  BOARD MARKED EAY34796801, EAX32268301

                  FAULT SYMPTOMS:

                  STAND BY
                  FLASHING LED
                  DEAD
                  WHATS IN THE KIT:

                  C217
                  C218
                  C226
                  C210
                  C221
                  C206
                  C222
                  C208

                    Comment

                    • junger
                      TV Enthusiast
                      • Sep 2011
                      • 13
                      • England
                      #6
                      Re: Lg 37lc55

                      hi all
                      The fault has developed further,now I can see in the back, when switched on the hv lights up, after about 10 mins the hv lights strobe/flash and then goes back to normal.
                      I have replaced the PSU board from my mates LG (same model) and it was the same, so I changed the main board and the fault travelled with the board. so the fault is on the main processing board, any ideas?

                        Comment

                        • selldoor
                          Slow Learner
                          • Dec 2010
                          • 7870
                          #7
                          Re: Lg 37lc55

                          Pictures top and bottom of your main board might help.
                          Did you try the hairdryer trick on the main board.
                          Please can you update your profile with country and mains voltage.
                          I will attach instructions for pictures.
                          Welcome to the forum-
                          We can help a lot more if you please post good clear pictures of the whole chassis, and then pictures of each board, front and back and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.

                          Please do not post inline and offsite as they slow down the loading of pages.

                          Examples of what is needed
                          https://www.badcaps.net/forum/attach...1&d=1290283049

                          https://www.badcaps.net/forum/attach...7&d=1280167246

                          It will be useful if you can say a bit about yourself - skills tools etc.
                          Please upload pictures using attachment function when ask for help on the repair
                          http://www.badcaps.net/forum/showthread.php?t=39740

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • rediii
                              thinkpad t460 - only charges when battery reinserted
                              by rediii
                              hello, the following problem:

                              the thinkpad would charge after reinserting the battery after charger is plugged. however, also when the adapter is installed and the battery is removed and reinserted. charging occurs adaptive (no steady 12 v on pl101/pr110).

                              i have checked all mosfets (they appear to be fine), all resistors, diodes and fuses on the circuit lines as well as replaced the charger ic twice as well as pq101 and pq102. i have also tried two original batteries (the device came with external battery only) and power supplies (65 and 90 w, which are also correctly...
                              12-11-2022, 01:55 PM
                            • Curious808
                              Brother HL-2140 laser printer: printer error (solved)
                              by Curious808
                              SOLVED. I removed the printer in settings, replugged and let it reinstall and it worked this time.

                              Brother HL-2140 laser printer
                              Windows 10

                              Attempt to print and immediately get a Windows pop-up saying "Error printing". The document appears in the printer queue window with Status "Error-printing".

                              Turned off printer. Unplugged, waited, replugged. Ran the Windows troubleshooter. Removed and reinserted toner cartridge. Checked for paper jam. No printer error lights. Reinstalled driver. Restarted the Spooler service. Rebooted...
                              06-22-2023, 11:11 PM
                            • Ryan.man
                              Macbook 2017 with touchbar (A1706) won't turn on after removing the screen
                              by Ryan.man
                              Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!

                              My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.

                              This time the original cable broke too close to the screen, it can't be fixed without tearing the screen...
                              02-04-2025, 12:23 PM
                            • SAFC
                              imac 21.5 820-3126-A 2011 dont power on
                              by SAFC
                              The device was brought to me after self-cleaning. After replacing the thermal interfaces, the iMac stopped turning on. While the client was rummaging around in it, he touched the power supply with the processor radiator, after which there was a bang.

                              I examined the power supply, replaced the burnt-out Zener diode ZD36 and the PWM controller DAP017. Now there are standby 12 and 4 volts

                              When connecting the board to the power supply, autostart occurs, only LED 501 lights up. The cooler starts to rotate, after half a second it stops and so on in a circle. For these half a...
                              09-21-2024, 05:20 AM
                            • Carl0s-
                              iPad 5th gen (A1823) - No charge but recognized by finder
                              by Carl0s-
                              Hi,

                              Sooo - our IT got a pile of old iPads that the sales guys have been mistreating. These are free for grabs if you want to try to get one working. Thought I'd give it a try - if I get at least some life to I can give to my kid to entertain during a car rides.

                              But the iPad it self - its a 5th gen cellular model. When I initially plug it in it was completely dead. It was not recognized by my Mac nor it started to charge. Disassembled it opened up the battery connector and checked the battery voltage. My multimeter showed 0,7v. Had a spare micro-usb charging board lying...
                              04-15-2024, 12:51 PM
                            • Loading...
                            • No more items.
                            Working...