Announcement

Collapse
No announcement yet.

Half screen on Sharp Aquos LC-32d64u

Collapse
X
Collapse
 
  • Page of 2
  • Filter
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
    #1

    Half screen on Sharp Aquos LC-32d64u

    I recently acquired a Sharp Aquos LC-32d64u LCD. Half the screen turns on and works, as pictured, and the other half doesn't. There had been some work on it due to a bad PSU, and it was replaced.

    I will not be able to really work on it until this week, but I was just curious if anyone had any experience with a problem like this, and could offer some initial guidance before I start working. Thanks
    Tags: None
    #2
    Re: Half screen on Sharp Aquos LC-32d64u





    Files were too large for site-uploader.

    Comment

      #3
      Re: Half screen on Sharp Aquos LC-32d64u

      Those two cables at the top, check they're both plugged in securely?

      Comment

        #4
        Re: Half screen on Sharp Aquos LC-32d64u

        They seem to be pretty secure.

        Comment

          #5
          Re: Half screen on Sharp Aquos LC-32d64u

          Check the boards that connect to the panel and check the one secured to the back of the panel with the 3 ribbon cables going into it.

          I take it all of the backlighting is working?

          Comment

            #6
            Re: Half screen on Sharp Aquos LC-32d64u

            Yes, all of the backlight is functional.

            Comment

              #7
              Re: Half screen on Sharp Aquos LC-32d64u

              It also might be worthing taking that section apart and just verify that if you disconnect both orange cables, that you get no picture (screen should be all black).

              If that works, I wonder if you can switch cables (careful if they are delicate or not long enough) to see if the other half the LCD lights up or not?

              At least that way, you know it is somewhere in that top section.

              Originally posted by seanc
              Those two cables at the top, check they're both plugged in securely?
              --- begin sig file ---

              If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

              We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

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

              --- end sig file ---

              Comment

                #8
                Re: Half screen on Sharp Aquos LC-32d64u

                When I disconnect both cables the whole screen is black. I plugged functioning output into the non-functioning input s and I got a horizontal white bar that went across both sections, and the opposite side of the screen was all yellow and distorted. I will try and take a picture.

                Comment

                  #9
                  Re: Half screen on Sharp Aquos LC-32d64u

                  It looks there are 4 screws to the top board where the orange cables are. You may want to take the shielding off to see if there are any bent pins, burnt ICs, bad caps, etc.

                  Originally posted by acidophilus
                  When I disconnect both cables the whole screen is black. I plugged functioning output into the non-functioning input s and I got a horizontal white bar that went across both sections, and the opposite side of the screen was all yellow and distorted. I will try and take a picture.
                  --- begin sig file ---

                  If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                  We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

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

                  --- end sig file ---

                  Comment

                    #10
                    Re: Half screen on Sharp Aquos LC-32d64u




                    Here is that board. I don't see any noticeable problems.

                    Comment

                      #11
                      Re: Half screen on Sharp Aquos LC-32d64u

                      Originally posted by acidophilus
                      When I disconnect both cables the whole screen is black. I plugged functioning output into the non-functioning input s and I got a horizontal white bar that went across both sections, and the opposite side of the screen was all yellow and distorted. I will try and take a picture.
                      Don't do that!!! The pin functions are not symetrical. I suspect a problem with the t-con board (the board under the cover), but swapping cables could blow something on the panel.

                      PlainBill
                      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                      Comment

                        #12
                        Re: Half screen on Sharp Aquos LC-32d64u

                        Sorry, my bad for suggesting that. :-(

                        Originally posted by PlainBill
                        Don't do that!!! The pin functions are not symetrical. I suspect a problem with the t-con board (the board under the cover), but swapping cables could blow something on the panel.

                        PlainBill
                        --- begin sig file ---

                        If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                        We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

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

                        --- end sig file ---

                        Comment

                          #13
                          Re: Half screen on Sharp Aquos LC-32d64u

                          Originally posted by PlainBill
                          Don't do that!!! The pin functions are not symetrical. I suspect a problem with the t-con board (the board under the cover), but swapping cables could blow something on the panel.

                          PlainBill

                          What are my options for dealing with the t-con board? I suspected that was the problem after researching a little more, and most of the solution was getting a new board. I suspect that is my only option, but I would prefer fixing this board, if possible.

                          Comment

                            #14
                            Re: Half screen on Sharp Aquos LC-32d64u

                            Originally posted by acidophilus
                            What are my options for dealing with the t-con board? I suspected that was the problem after researching a little more, and most of the solution was getting a new board. I suspect that is my only option, but I would prefer fixing this board, if possible.
                            I'm not optimistic about the chances of fixing it. In theory troubleshooting it should be easy - identify the lines which handle column information and see where they come from. Without a schematic, that gets very difficult. It would be worthwhile examining the resistor packs next to CN4 and CN5, and even reflowing the solder if any look suspicious.

                            The other side is the boards are available on eBay for what I consider a reasonable price.

                            Of course, before spending any money, I WOULD wait for wizard to share his knowledge. He probably fixes more of these in a day than I have fixed in my life.

                            PlainBill
                            For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                            Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                            Comment

                              #15
                              Re: Half screen on Sharp Aquos LC-32d64u

                              Best replace that t-con board and see.

                              Cheers, Wizard

                              Comment

                                #16
                                Re: Half screen on Sharp Aquos LC-32d64u

                                I just replaced the T-con board and no such luck. The whole screen lights up, but only half shows the snow and menu. The other half stays dark.

                                Comment

                                  #17
                                  Re: Half screen on Sharp Aquos LC-32d64u

                                  Another interesting tidbit; When I don't plug in the cable going into the left side from the T-con board, the snow disappears, but that side of the screen is lit a different color than the right.

                                  When none are plugged in, both sides appear to light up the same.
                                  Last edited by acidophilus; 07-06-2010, 11:27 PM.

                                  Comment

                                    #18
                                    Re: Half screen on Sharp Aquos LC-32d64u

                                    From this point I imagine the Driver board is at fault. I don't have a schematic for the TV, so I can't really test it. I hope it might be the cable(MAIN TO TCON), which shows some wear. though, I would like opinions from the experts.

                                    Comment

                                      #19
                                      Re: Half screen on Sharp Aquos LC-32d64u

                                      Any other ideas? Wizard, Plainbill?

                                      Comment

                                        #20
                                        Re: Half screen on Sharp Aquos LC-32d64u

                                        What other boards feed the t-con board? Power supply and main board? Did you try other input sources? You are missing half the screen. I would check ribbon cables at the t-con you just replaced. The screen is split down the middle I think that takes place at the t-con board. double check all of your ribbon connectors.

                                        Comment

                                        Previous 1 2 template Next
                                        Working...
                                        X