samsung LN-T4066F rainbow colors on screen

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  • jose6326
    Badcaps Veteran
    • May 2013
    • 707
    • USA
    #1

    samsung LN-T4066F rainbow colors on screen

    Here are the issues I am having which is a 3-4 step process for the tv to have perfect display

    When I first power on the tv I get all these wonderful colors on the screen like I am on some drug
    Pleas see first 2 pics

    I have to let the tv "warm up" for about 3-5 minutes
    Then I turn it off for 1-2 minutes

    I power it back on then the colors are gone but you can still see some of the pixels are off color
    See 3rd pic

    Then I have to turn off tv for another 2-3 minutes
    At this point I power on the tv and the display is perfect with no rainbow colors or pixels
    Please see 4th pic

    I really don't care about the process it takes to turn on since its my sons tv but I would like to fix it

    I took apart the cover and found some blown caps on the power supply
    I ordered the caps hopefully I get them on Monday

    But I dont think the caps are causing the rainbow colors I think its a bad tcon board but its just a guess

    Thanks for the help
    Attached Files
    Tags: None
    • jose6326
      Badcaps Veteran
      • May 2013
      • 707
      • USA
      #2
      Re: samsung LN-T4066F rainbow colors on screen

      Sorry for the angle of the pics
      When I upload them to this site they get turned on an angle for some reason

        Comment

        • capkid
          Badcaps Legend
          • Oct 2010
          • 1339
          • United States
          #3
          Re: samsung LN-T4066F rainbow colors on screen

          It could be the t-con, but you'll obviously know better after the caps are changed.
          Last edited by capkid; 07-13-2013, 06:04 PM.
          LG Plasma Mal-Discharge Correction Service

            Comment

            • jose6326
              Badcaps Veteran
              • May 2013
              • 707
              • USA
              #4
              Re: samsung LN-T4066F rainbow colors on screen

              I forgot to mention that the rainbow colors do NOT come back when the tv is on

              My son can be playing xbox for hours and the colors do NOT come back

              Only after the tv has been off for more than an hour the colors come back

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: samsung LN-T4066F rainbow colors on screen

                  Bad capacitors can cause this issue, so I would definitely change them for Panasonic FR/FM/FC before doing any other diagnosis.
                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

                    • jose6326
                      Badcaps Veteran
                      • May 2013
                      • 707
                      • USA
                      #6
                      Re: samsung LN-T4066F rainbow colors on screen

                      Hopefully changing the caps wikl fix this issue then it will be an easy fix

                      I will post after I replace the caps

                      Thanks

                        Comment

                        • Glitcher
                          Badcaps Veteran
                          • Mar 2013
                          • 673
                          • USa
                          #7
                          Re: samsung LN-T4066F rainbow colors on screen

                          Just recently repaired this model TV. Sometimes it would not turn on and or give a colored screen. Changing the capacitors fixed the issue.

                            Comment

                            • jose6326
                              Badcaps Veteran
                              • May 2013
                              • 707
                              • USA
                              #8
                              Re: samsung LN-T4066F rainbow colors on screen

                              Yes tom66 and glitcher is correct

                              it was the caps

                              I replaced all 8 and now the tv works perfectly

                              Thanks for all the help

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK
                                  #9
                                  Re: samsung LN-T4066F rainbow colors on screen

                                  Great to hear, another TV fixed and saved from landfill.
                                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                    Comment

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