Announcement

Collapse
No announcement yet.

LG 42LH30 with no picture, audio and backlight/screen work

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #21
    Re: LG 42LH30 with no picture, audio and backlight/screen work

    Hi I am new, I had similar problem on my LG. I have replaced T-Con board, I have now half picture OK and half black screen on the left. However after keeping TV on for about 20-25 minutes whole screen returns to normal and I can enjoy TV. Wondering what the cause will be now?

    Comment


      #22
      Re: LG 42LH30 with no picture, audio and backlight/screen work

      I'm new as well. Same TV, similar problem: I have an LG 42LH30 with bad color resolution. Colors are all over the place and don't respond to tint adjustments. Otherwise, it turns on just fine and the sound is also okay. I have had no trouble at all with this TV since we purchased it in Sept. '09. I've removed the back to look for bulged capacitors or other signs of loose or bad connections, etc. I can't pinpoint anything.

      My question: Is this TV repairable at all, either by me or a knowledgable technician? Or is it worm-food? Be realistic in your responses, please. Thank you very much.

      Comment


        #23
        Re: LG 42LH30 with no picture, audio and backlight/screen work

        Originally posted by Nimravak View Post
        Got the SMT fuse in the mail today and soldered it to the board, replacing the old one. Ended up with the same washed out area as before. Thinking now that it is the panel itself. Kinda iffy about buying a new t-con board if it is the panel.

        Vince, I did make sure that the blade fuse was not touching anything else. It was completely free except at the solder points. Selldoor, didn't notice anything in that area of high real estate that had a problem, though I don't know what and how to test.
        So did you replace the tcon? If so results...

        Comment


          #24
          Re: LG 42LH30 with no picture, audio and backlight/screen work

          Got an LG 42LH30; a lightening dropped in and tv went off. Turn it on again and now I have a blue screen, but no picture. Sound and changing channels work. I wonder if the lightening messed up the main board. Power supply seems to work okay since every thing is working except for the picture. Help please.

          Comment


            #25
            Re: LG 42LH30 with no picture, audio and backlight/screen work

            Check TCON fuse

            Comment


              #26
              Re: LG 42LH30 with no picture, audio and backlight/screen work

              Hi, I have the same problem, i fix the fuse and turn on mi tv appears white bars in the tv.

              Comment


                #27
                Re: LG 42LH30 with no picture, audio and backlight/screen work

                Originally posted by kicho666 View Post
                Hi, I have the same problem, i fix the fuse and turn on mi tv appears white bars in the tv.
                What do you get on the screen if you have the ribbon cable between the T-CON board and the LCD panel connected one at a time?
                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


                  #28
                  Re: LG 42LH30 with no picture, audio and backlight/screen work

                  black screen

                  Comment


                    #29
                    Re: LG 42LH30 with no picture, audio and backlight/screen work

                    Originally posted by kicho666 View Post
                    black screen
                    That does not sound right, you should see white screen on the unconnected cable between the T-CON and LCD panel.
                    See post #10
                    https://www.badcaps.net/forum/showth...ight=lg+47lh55
                    Last edited by budm; 09-20-2016, 05:30 PM.
                    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


                      #30
                      Re: LG 42LH30 with no picture, audio and backlight/screen work

                      My t-con board is different, use one ribbon to Main board to T-con
                      Attached Files
                      Last edited by kicho666; 09-20-2016, 05:52 PM.

                      Comment


                        #31
                        Re: LG 42LH30 with no picture, audio and backlight/screen work

                        Originally posted by kicho666 View Post
                        My t-con board is different, use one ribbon to Main board to T-con
                        Again, may be you do not understand what I am telling you what to do, we are talking about the ribbon cables BETWEEN THE LCD panel and the T-CON board, NOT the cable between the main board and the T-CON board.
                        You have TWO cables between the T-CON board and the LCD PANEL! It does not matter if you have one or two cables between the T-CON and the main board.
                        So did you do one cable at at time?
                        Last edited by budm; 09-20-2016, 06:27 PM.
                        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


                          #32
                          Re: LG 42LH30 with no picture, audio and backlight/screen work

                          https://www.badcaps.net/forum/attach...0&d=1474415342
                          That is bad panel.
                          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

                          Working...
                          X