Samsung la55c750r2f - screen goes green then won't turn on

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  • jimbojangles
    New Member
    • Feb 2015
    • 5
    • Australia
    #1

    Samsung la55c750r2f - screen goes green then won't turn on

    Hi all,

    I've got a samsung la55c750r2fxxy LCD TV with a problem. After watching for a while, the screen briefly goes totally green (1 second), then goes black. The standby light goes off, but flashes red when you try turning it on again.

    If the TV is unplugged for a few minutes, it turns back on normally again, but the problem continues to happen.

    I've tried cleaning the ribbon cable, and I've replaced the 2 25v 1000uf capacitors on the power supply board, but the problem persists.

    All the capacitors appear fine, but I'm considering replacing the rest of them on the power supply board.

    Any hints, other than take it to Samsung?

    Thanks!
    Last edited by jimbojangles; 02-15-2015, 06:39 PM.
    Tags: None
    • newtothis
      Badcaps Legend
      • Mar 2013
      • 1556
      • england
      #2
      Re: Samsung la55c750r2f - screen goes green then won't turn on

      Pics of each board and one of entire layout please

        Comment

        • jimbojangles
          New Member
          • Feb 2015
          • 5
          • Australia
          #3
          Re: Samsung la55c750r2f - screen goes green then won't turn on

          Originally posted by newtothis
          Pics of each board and one of entire layout please
          Here are some pics - let me know if they're not adequate!
          Attached Files

            Comment

            • nomoresonys
              Badcaps Legend
              • Jan 2013
              • 12206
              • U.S.
              #4
              Re: Samsung la55c750r2f - screen goes green then won't turn on

              do you have a digital multimeter to test with?
              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                Comment

                • jimbojangles
                  New Member
                  • Feb 2015
                  • 5
                  • Australia
                  #5
                  Re: Samsung la55c750r2f - screen goes green then won't turn on

                  Originally posted by nomoresonys
                  do you have a digital multimeter to test with?
                  I've got one but I've never used it before. I might need to watch some youtube to know what you do with it!

                    Comment

                    • nomoresonys
                      Badcaps Legend
                      • Jan 2013
                      • 12206
                      • U.S.
                      #6
                      Re: Samsung la55c750r2f - screen goes green then won't turn on

                      for sure, youtube has good tutorials, when your comfortable, let us know, we can help you test.
                      Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                        Comment

                        • jimbojangles
                          New Member
                          • Feb 2015
                          • 5
                          • Australia
                          #7
                          Re: Samsung la55c750r2f - screen goes green then won't turn on

                          Right! Skills acquired! Now, what should I be measuring?

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12206
                              • U.S.
                              #8
                              Re: Samsung la55c750r2f - screen goes green then won't turn on

                              ok, check the connectors of power supply, the label is there by it, says 5v, 13v, 18v etc, looks like you can test from the back, the metal pins there, test with tv on, black probe to chassis, as always be careful working with power supply, HIGH VOLTAGE, on primary side can be deadly.
                              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                Comment

                                • ReeceyBurger123
                                  Never Give Up !
                                  • May 2014
                                  • 7325
                                  • Britain
                                  #9
                                  Re: Samsung la55c750r2f - screen goes green then won't turn on

                                  Its seems to be heat related, if you have a hair drier use it and heat the boards, especially the tcon and motherboard too see if heating one or the other speeds the timing of the fault up showing you what board is at fault.
                                  Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                                  https://www.facebook.com/Telford-Tel...7894576335359/

                                    Comment

                                    • nomoresonys
                                      Badcaps Legend
                                      • Jan 2013
                                      • 12206
                                      • U.S.
                                      #10
                                      Re: Samsung la55c750r2f - screen goes green then won't turn on

                                      Originally posted by jimbojangles
                                      Hi all,

                                      I've got a samsung la55c750r2fxxy LCD TV with a problem. After watching for a while, the screen briefly goes totally green (1 second), then goes black. The standby light goes off, but flashes red when you try turning it on again.

                                      If the TV is unplugged for a few minutes, it turns back on normally again, but the problem continues to happen.

                                      I've tried cleaning the ribbon cable, and I've replaced the 2 25v 1000uf capacitors on the power supply board, but the problem persists.

                                      All the capacitors appear fine, but I'm considering replacing the rest of them on the power supply board.

                                      Any hints, other than take it to Samsung?

                                      Thanks!
                                      could be those other caps, at least they dont cost a lot.
                                      Last edited by nomoresonys; 02-16-2015, 07:53 AM.
                                      Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                        Comment

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