Sharp LC60LE660U screen flashes on power on then nothing

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • rddube
    Aspiring Expert
    • Jun 2013
    • 907
    • Canada

    #1

    Sharp LC60LE660U screen flashes on power on then nothing

    Hello to this wonderful community.

    I thought I would start a new thread for this TV I bought from someone who said that it just would not turn on any more.

    It's a Sharp LC60LE660U and when I tried it it just flashed the backlights very quick and then the standby light would stay on white, nothing else. I can then turn off the tv. There is no image, no sound.

    I stumbled across this thread about leds maybe being an issue, so I disassembled it and checked every lead (they are Samsung 7030 leds 6V and they all tested fine.

    So now I don't know what to look for, can anybody help? Sam_sam_sam started helping me in another thread, but I now started this one in the right forum. Thank you to everyone!
    Attached Files
    Last edited by rddube; 08-06-2018, 06:14 PM.
  • sam_sam_sam
    Badcaps Legend
    • Jul 2011
    • 6018
    • USA

    #2
    Re: Sharp LC60LE660U screen flashes on power on then nothing

    Please repeat how you get the Back light to come on which board did you disconnect
    Show which board it is

    Comment

    • rddube
      Aspiring Expert
      • Jun 2013
      • 907
      • Canada

      #3
      Re: Sharp LC60LE660U screen flashes on power on then nothing

      It is this board, the Tcon.
      Attached Files

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Sharp LC60LE660U screen flashes on power on then nothing

        When you disconnect the PL connector (it looks to be for supplying the 12VDC to run the T-CON) on the T-con side or on the power supply side, what Voltages do you have on the pins of the connector that you removed?
        No error codes?
        Last edited by budm; 08-06-2018, 08:54 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

        • rddube
          Aspiring Expert
          • Jun 2013
          • 907
          • Canada

          #5
          Re: Sharp LC60LE660U screen flashes on power on then nothing

          Hey Budm, thanks for your intervention! That monitor you helped me fix (Viewsonic) is working like a charm.

          I am at work right now, so will get to your question about the voltage on the PL connector later tonight. No, I get no error codes, just a quick flash of the backlights and then the TV stays on with the standby led lit up white.....I can then turn off the TV.

          Will get back to you later!

          Comment

          • Nick's Tvs
            Badcaps Veteran
            • Jan 2014
            • 621
            • USA

            #6
            Re: Sharp LC60LE660U screen flashes on power on then nothing

            Very common issue with these, you have a main board failure. You will not be able to fix it yourself you will have to purchase a brand new board.

            A lot of places are out of stock for these guys but if you go to eBay and buy there, they have a few for sale.
            Here is a link to the cheapest one out there for your model:

            https://www.ebay.com/itm/Sharp-Aquos...LH_TitleDesc=0

            It does come with a 30 day warranty.
            They go fast, so I wouldn't wait to long before getting it.

            Good luck

            Comment

            • rddube
              Aspiring Expert
              • Jun 2013
              • 907
              • Canada

              #7
              Re: Sharp LC60LE660U screen flashes on power on then nothing

              Budm: Ok, when I disconnect the PL connector from the Tcon, I get 11,75V on pin 1 and 2 and 0V on pin 3 and 4. I get no error messages. I did a test and disconnected the left ribbon cable from the TCon (picture attached), everything else connected and the TV powered up with the right side working but the left side all white. I could get into the menu. When I reconnected the left ribbon cable, same symptoms as from the start i.e. the screen blinks very fast and the led light is on solid color white.

              Nick: Thanks for the heads up, but I think I will try and repair it with Budm in the picture, I wouldn't be surprised that he finds the fault even if it's on the main board. I'm suspecting its not the main board, because of the test I did...but maybe it is. Do you know what fails on the main board?
              Attached Files
              Last edited by rddube; 08-07-2018, 05:58 PM.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: Sharp LC60LE660U screen flashes on power on then nothing

                Right now it looks like panel problem because you can get half of the screen to work, it may have bad side tab driver problem.
                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

                • rddube
                  Aspiring Expert
                  • Jun 2013
                  • 907
                  • Canada

                  #9
                  Re: Sharp LC60LE660U screen flashes on power on then nothing

                  Hi Budm,

                  Ok, I think you are right. I tried it with the right ribbon cable disconnected from the Tcon, and I get backlights but for about 1 second then blank. I retried with left ribbon cable disconnected (right cable connected) and TV stays on and works, but half the screen.

                  So if it is the little panel at the bottom of the screen, what should I be looking for? I notice there are a number of smd caps and resistors and what seems to be test points. Do you want me to take close up photos of that whole little board (probably 2 or 3 photos side to side) or what should I do? Tks Budm.

                  Comment

                  • budwich
                    Badcaps Legend
                    • Jul 2015
                    • 3097
                    • Canada

                    #10
                    Re: Sharp LC60LE660U screen flashes on power on then nothing

                    besides the edge boards at the bottom, post a picture of your "half working display"... make sure you input something that provides some "known picture" (ie test pattern) so we can look at the results... they might indicate where to go from there.

                    Comment

                    • rddube
                      Aspiring Expert
                      • Jun 2013
                      • 907
                      • Canada

                      #11
                      Re: Sharp LC60LE660U screen flashes on power on then nothing

                      Ok, I took some photos of the edge board, bear with me if they are not that great it is quite a long board and trying to hold my light with the camera in the other hand, well...but please shout if you want me to focus on something specific.

                      As for the picture of the TV with the left ribbon cable disconnected, well this is almost a circus act. I popped up the menu, but since the tv is lying on it's face, I had to lift it and try and take photos so I guess I'm an acrobat now. The menu is at the bottom of the photos, upside down because I have the TV bottom side facing me.

                      But feel free to let me know anything you need and I will do my best to respond. Thanks Budwich and Budm!

                      Oh, by the way did you notice the length of thos ribbon cables, for some reason they are way to long so they have folded them - could that be a possible cause, a kink or broken line in the left cable? I guess I could always switch them around and see what that gives, but I'll wait for your advice before fiddling around with that.
                      Attached Files
                      Last edited by rddube; 08-07-2018, 07:22 PM.

                      Comment

                      • rddube
                        Aspiring Expert
                        • Jun 2013
                        • 907
                        • Canada

                        #12
                        Re: Sharp LC60LE660U screen flashes on power on then nothing

                        Gentlemen, when you look at photo 4, you can see that the left edge board is made up of 2 boards connected with another ribbon cable. That means there are 4 edge boards, 2 on each side connected with a ribbon cable between each other. When I disconnected the left half (so I had everything connected except that half panel board at the left, then I had the TV turn on and i then had 3/4 of a screen which seemed to work perfectly. There is the bottom menu backwards, but I also see a horizontal line at the top that you can see in the 8th photo (which might be another problem?).

                        So it seems that the problem is coming from that half panel board which is totally on the left of the photo #4 (since we are looking at the back, that would be the half panel board on the right bottom of the tv. Hope this helps?

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: Sharp LC60LE660U screen flashes on power on then nothing

                          Start checking the resistance of those small light brown color rectangular caps on the the board that you left disconnected, hopefully it will be just bad cap with low resistance reading.
                          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

                          • rddube
                            Aspiring Expert
                            • Jun 2013
                            • 907
                            • Canada

                            #14
                            Re: Sharp LC60LE660U screen flashes on power on then nothing

                            Ok Budm, I checked them all and they all but 1 look ok greater than 235K. One of them, when I would put my needle test leads on the solder joints, I would get megahoms, but when I would put it on the edge of the cap it was 243K ohms. I had to jiggle a bit my leads to in the solder joint to finally get it to read 243k ohms. Could it be a bad solder joint? How can I tell, as I tried from the one of the edges of the cap to where is was connected to the edge of the cables going into the panel, that was ok. The other side, I don't have a test point that I could measure the edge of the cap to.

                            Do you want me to try and get a macro photo of the soldering of a few caps on that board including the suspect one? Tks.

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #15
                              Re: Sharp LC60LE660U screen flashes on power on then nothing

                              I am looking for something with 100 Ohms or less for the bad caps.
                              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

                              • rddube
                                Aspiring Expert
                                • Jun 2013
                                • 907
                                • Canada

                                #16
                                Re: Sharp LC60LE660U screen flashes on power on then nothing

                                I rechecked the caps (twice) to make sure I hadn't missed one. Most of them are in the k ohms area, while a few 3-4 are in the ohms area the lowest one being at 435 ohms. I checked on the good side of the panel boards and I get similar readings i.e. most in the k ohms area while a few in the 440 - 450 ohm area.

                                I also checked the resistors, they all give a reading some of them just a few ohms which is probably ok.

                                So I guess that means bad news? Tks Budm.

                                Comment

                                • budwich
                                  Badcaps Legend
                                  • Jul 2015
                                  • 3097
                                  • Canada

                                  #17
                                  Re: Sharp LC60LE660U screen flashes on power on then nothing

                                  the good news is that you isolated your focus to a part of the edge board and that you got "3/4s" of a screen. That means that the tcon to panel connections are good. The bad news is that it is likely a issue from the bottom edge board (end "piece") to the panel and the side tab drivers. You might get lucky with your checks of the smd components on the edge board in question... but because of the horizontal line, it is also likely that the problem is with the side tab drivers. You need to look at these especially the one in the bottom corner of the side. You need to inspect all of them for heating / damage... this has to be done from the front... you need to take off the bezel to see them. Anyways, if I am right, the set can still be save once you have done your checks. The "save" is done by removing all of the side tabs on that side of the panel. Lots of threads in the forum about this "save". The tv will basically operate "fully normally" along with a good picture.
                                  Last edited by budwich; 08-08-2018, 05:08 AM.

                                  Comment

                                  • rddube
                                    Aspiring Expert
                                    • Jun 2013
                                    • 907
                                    • Canada

                                    #18
                                    Re: Sharp LC60LE660U screen flashes on power on then nothing

                                    Budwich, with your input and that of Budm, I think we are getting closer. When I first thought that it was a led problem I opened her up to get to the leads and had noticed one of those side tabs being a little crimpled, but didn't pay too much attention to it my main focus was to diagnose the leds.

                                    When I found out the leds were good, I put her back together and sort of placed that "crumpled" tab the best I could not thinking the problem could come from there.

                                    So this morning, I reopened removing the metal frame. That crumpled tab seemed to be a lot better than when I first encountered it but it was now in free air so I thought I'd do my tests touching it to see if it changed anything. Note that the crumpled tab is the bottom one on the right, closest to the where are the panel boards.

                                    So attached are photos of my results with my findings.

                                    Photo 1 shows the screen now with the left ribbon cable to tcon disconnected (looking from the back of the TV, but from the front it is the right side cable) This is the cable that I disconnected last night and would get half a picture and when I disconnected the second half of that side it got 3/4 piciture. Funny, I get no picture like I did when it was facing down instead of up?

                                    When I touch the crumpled tab lightly putting some pressure, nothing happens. So I decided to touch the left bottom tab, and wow it was hot, burning hot. But as I touched it, something started moving on the screen as if more pixels were being shown. So I turned everything off not to damage any further and took more photos. Photo 2 is the left bottom tab that becomes hot - looks very good physically. Photo 3 is photo of crumbled tab bottom right. Photo 4 is a photo of middle right tab that looks normal and doesn't become hot, neither of the other tabs that I checked on the TV.

                                    So you are saying that this can be repaired in some way? Which one is the culprit, is it the crumbled one (I guess so, but why is it the opposite one that becomes so hot?).

                                    Anyway you got me excited now. Oh, and for Budm, I rechecked those caps again and they all seem ok.
                                    Attached Files

                                    Comment

                                    • budwich
                                      Badcaps Legend
                                      • Jul 2015
                                      • 3097
                                      • Canada

                                      #19
                                      Re: Sharp LC60LE660U screen flashes on power on then nothing

                                      well, all I can say is don't run the set very much in this mode as you may very well burn out your "last hope". I post this quickly. Hopefully, you get the warning sooner than later.
                                      Last edited by budwich; 08-08-2018, 07:31 AM.

                                      Comment

                                      • budwich
                                        Badcaps Legend
                                        • Jul 2015
                                        • 3097
                                        • Canada

                                        #20
                                        Re: Sharp LC60LE660U screen flashes on power on then nothing

                                        now for the longer explanation.
                                        the side tabs are driven in "pairs" so to speak both helping to power the signal across the panel in a fashion. However, the set can operate with only one side of tabs but the result will be a "slightly out of design spec" or "compromised" operation but for normal viewing will likely be OK unless you have "golden eyes". :-)

                                        Anyways, when one side tab is not functioning properly, it puts an additional load on the other one which is now trying to drive the panel and the "not so good" other side tab. I think that is the "hot" problem that you are feeling on the "GOOD" tab. As you can probably see, I am kind of telling which is good and bad.

                                        As you have found, when disconnected certain cables you got a "picture" one way and not the other. This is because when you disconnected the "bad" tab from being driven by the bottom edge boards, the system was able to make a picture with the remaining hardware. When you change this and disconnected the "good" tab(s) (ie. opposite side), the system had to try to operate with the bad tab(s) in place and failed, thus shutting down.

                                        Hope you can follow the reasoning. My guess is that the bad tab is the crumpled one and its loading down the other one causing it to potentially over heat.... DON'T let that happen because once the other side dies, your set can no longer be saved... the panel is garbage but the cards can be salvaged for sale if you want.

                                        Read some threads in and around these sets and you will get a better idea / understanding of what's up.

                                        The "save operation" is the removal of all the tabs along the side that is bad. NOTE this is a one time operation and CAN NOT be undone so read and make sure this is your only way out. FURTHER, DO NOT touch / play with any of the tabs along the bottom edge boards as when these are damaged they are NOT duplicated and the set can not work with them damaged / removed.

                                        Again, read and read a few threads in this domain.... this set is likely "saveable".
                                        Last edited by budwich; 08-08-2018, 08:11 AM.

                                        Comment

                                        Related Topics

                                        Collapse

                                        • 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
                                        • EazyBone
                                          Sharp LC-65Q620U White Screen
                                          by EazyBone
                                          Another TV topic!!
                                          I got this sharp TV that when I first plugged it in it showed the sharp logo and then went to the input screen. This was about 30 seconds and then it showed white screen. Now I can't see anything but white screen. This has a separate TCON and Main.

                                          The TCON is getting 12V and several parts are as well but the VGH line is only .5Volts which I thought is totally incorrect.

                                          Am I on the correct assumption that the TCON is bad somehow if I'm only getting that voltage or is there something else I should check?...
                                          08-21-2024, 12:56 PM
                                        • Mad_Science
                                          Sharp TFT-LCD Model No. LQ050Q5DR01 gray screen
                                          by Mad_Science
                                          I have a older eddy current tester made by Olympus that uses interchangeable TFT-LCD screens. I have two devices that each take the same removable screens. One is an Olympus NORTEC 200D+ and the other is an Olympus SONIC 1200M EMI. I have searched the internet high and low for service manuals for these units with no luck. Both these units were used extensively by the US military for NDT on airplanes. The detachable screen plugs into the base unit via a weird non standard VGA connector. Buttons on the removable display are used to power the units on. When the power button is pressed the unit makes...
                                          03-01-2024, 05:05 PM
                                        • scubacamper
                                          Sharp Aquos LC-70C6400U Half Screen Dark
                                          by scubacamper
                                          I found another post on this site the other day which has been very helpful in troubleshooting this issue I am having with my tv. The left half of the screen is dark, and the other half is VERY slow to generate it's image - and it only generates part of its image at that.
                                          Based on this yt video, I have narrowed it down to an issue (short?) on the left side of the display, somewhere in the system of ribbon cables.
                                          when I remove the bezel and the rear cover, I can get the image to display correctly by manipulating the ribbon cables on the left side which connects the left lower display...
                                          05-03-2025, 12:19 PM
                                        • smic717394
                                          iphone XS turns off when press on screen.
                                          by smic717394
                                          Hi,

                                          I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on...
                                          07-25-2024, 10:16 AM
                                        • Loading...
                                        • No more items.
                                        Working...