Sharp AQUOS LC-60LE640U - Very dim picture, help?

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  • Rky290
    Member
    • Apr 2014
    • 10
    • US
    #1

    Sharp AQUOS LC-60LE640U - Very dim picture, help?

    I've exhausted almost all resources trying to fix this tv, maybe you guys can help. When I turn on the tv, it looks normal, no flashing power light or anything. When you turn off all the lights and shine a flashlight at it, you can see an image but it's EXTREMELY dim.

    From the research I've done I thought I had it narrowed down to the led driver. I replaced the power supply, which is where the led driver is located (from what I've found online). Nothing, still the exact same problem.

    I've emailed the tech support at shopjimmy, who told me that they also thought the problem would be the power supply/led driver. The tech support then said eliminate the problem and replace the main board. From everything I've seen, it doesn't seem like the main board would be causing this issue and just end up costing more money.

    I don't know if it's worth adding but the....computer chip on the main board has a green light next to it which blinks when the tv is turned on, I don't know if that's at all relevant.

    Any ideas? Thank you for your time.
    Tags: None
    • Shinju
      Badcaps Legend
      • Mar 2014
      • 1239
      • USA
      #2
      Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

      Since this is going to be required, take a photo of the entire back of the panel exposed so the insides can be seen, also take a photo of each board if possible.

      Sounds like a bad inverter board but it could be low voltage from the power supply too, Do you have a digital voltmeter?

        Comment

        • Rky290
          Member
          • Apr 2014
          • 10
          • US
          #3
          Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

          Sorry, I'm on mobile.

          Here's a video I took when I was talking to shop jimmy.
          http://youtu.be/4g3S-MSOXjg
          Attached Files

            Comment

            • Rky290
              Member
              • Apr 2014
              • 10
              • US
              #4
              Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

              I do have a digital voltmeter. I can take pictures of each board when I get off work in an hour. Thanks for the fast reply. As far as I understood since this is an led tv it doesn't have an inverter board?

                Comment

                • audiofreak19
                  Badcaps Veteran
                  • Apr 2013
                  • 556
                  • usa
                  #5
                  Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                  The only reason I could see them saying the main board is some tv's main board sends the signal to turn the back light on.

                    Comment

                    • Shinju
                      Badcaps Legend
                      • Mar 2014
                      • 1239
                      • USA
                      #6
                      Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                      Originally posted by Rky290
                      I do have a digital voltmeter. I can take pictures of each board when I get off work in an hour. Thanks for the fast reply. As far as I understood since this is an led tv it doesn't have an inverter board?
                      I must have mistyped the model number the one I saw was lcd, I have yet to tinker with a LED so I am no help here but there is a Wealth of knowledge here and folks willing to help!

                        Comment

                        • Rky290
                          Member
                          • Apr 2014
                          • 10
                          • US
                          #7
                          Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                          Originally posted by Shinju
                          I must have mistyped the model number the one I saw was lcd, I have yet to tinker with a LED so I am no help here but there is a Wealth of knowledge here and folks willing to help!
                          I appreciate it anyway. If you have any advice, feel free to chime in!

                            Comment

                            • Rky290
                              Member
                              • Apr 2014
                              • 10
                              • US
                              #8
                              Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                              Originally posted by audiofreak19
                              The only reason I could see them saying the main board is some tv's main board sends the signal to turn the back light on.
                              Well, I guess I could send back the power supply since that wasn't the issue and order a main board.

                                Comment

                                • johnboy1313
                                  Badcaps Legend
                                  • Nov 2012
                                  • 1959
                                  • USA
                                  #9
                                  Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                                  It could be a bad LED strip in the panel. I have a LC-60LE632U LED at home that looks very similar from the back. Mine has a crack on one side of the screen but still shows a good picture on the undamaged part. Post part numbers for your boards and I'll see if I can dig that one out and pull some voltages for you to compare.

                                    Comment

                                    • Rky290
                                      Member
                                      • Apr 2014
                                      • 10
                                      • US
                                      #10
                                      Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                                      Originally posted by johnboy1313
                                      It could be a bad LED strip in the panel. I have a LC-60LE632U LED at home that looks very similar from the back. Mine has a crack on one side of the screen but still shows a good picture on the undamaged part. Post part numbers for your boards and I'll see if I can dig that one out and pull some voltages for you to compare.
                                      On mobile again. I went ahead and just ordered a main board and returned the power supply from the same company. I'll see if that works and update. This is my main board part number - QPWBXF733WJN2.

                                        Comment

                                        • Rky290
                                          Member
                                          • Apr 2014
                                          • 10
                                          • US
                                          #11
                                          Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                                          So, I believe I've narrowed it down to the actual LED light strips. It just can't be anything else. I ended up taking it to a TV repair shop and he agreed. I haven't dismantled it that far yet but after a few searches for the LED strips I haven't been able to come up with any online. Can somebody point me in the right direction?

                                            Comment

                                            • Rky290
                                              Member
                                              • Apr 2014
                                              • 10
                                              • US
                                              #12
                                              Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                                              Well, if anybody is still following this I got the LED strips out. The part number is GA0361TPZZ. It's a whole combined heat sink/LED strip.

                                                Comment

                                                • ek2oo2
                                                  Member
                                                  • Oct 2013
                                                  • 24
                                                  • Philippines
                                                  #13
                                                  Re: Sharp AQUOS LC-60LE640U - Very dim picture, help?

                                                  did it worked?

                                                    Comment

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