Philips 42PFL3704D/F7 Turns on Then Shuts Off

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  • barryra
    Senior Member
    • Aug 2013
    • 107
    • USA
    #1

    Philips 42PFL3704D/F7 Turns on Then Shuts Off

    I'm working on a Philips 42PFL3704D/F7 when it's unplugged for a day it will turn on & work for about an hour... then shuts off... power lights & screen off. When I hit power button on remote or tv.... I hear a click... power light comes on for a few seconds.... nothing on screen... then power light turns off & there's a click.

    Any ideas? Thanks
    Tags: None
    • barryra
      Senior Member
      • Aug 2013
      • 107
      • USA
      #2
      Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

      Anyone have a idea? Caps look good

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

          Could you supply pictures of the boards so we know what we're dealing with? Also one of the whole TV chassis.
          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

            • barryra
              Senior Member
              • Aug 2013
              • 107
              • USA
              #4
              Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

              Sure.. thanks for the reply.
              Attached Files

                Comment

                • barryra
                  Senior Member
                  • Aug 2013
                  • 107
                  • USA
                  #5
                  Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                  did you get a chance to look at the pictures tom? Thanks

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                      Ugh... yeah... it's one of "those". A Funai based "Philips" set.

                      http://www.toms-service-manuals.com/...&Search=Submit

                      Top result.

                      There are several parts which produce voltages for the rest of the TV. Page 52 has some, as does page 56. These are low voltage supply voltages for the main board and the 24V for the backlight inverter.
                      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

                        • barryra
                          Senior Member
                          • Aug 2013
                          • 107
                          • USA
                          #7
                          Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                          Oh ok... so it may not be as easy as replacing caps on the power/inverter board? I'll check some voltages.

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK
                              #8
                              Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                              Bad capacitors are an issue on these but they are less common than other faults.
                              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

                                • barryra
                                  Senior Member
                                  • Aug 2013
                                  • 107
                                  • USA
                                  #9
                                  Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                                  Thanks Tom, I'm still trying to pinpoint the issue.

                                    Comment

                                    • tocold4u2
                                      Badcaps Veteran
                                      • Dec 2012
                                      • 284
                                      • usa
                                      #10
                                      Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                                      I am suppose to pick one of these up that keeps blowing fuses when powered on ..will lert ya know when i get to open it up

                                        Comment

                                        • ftaylor74
                                          Member
                                          • Jan 2014
                                          • 18
                                          • USA
                                          #11
                                          Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                                          Barryra... did you ever resolve this problem? I have a similar problem on my in-laws TV.

                                            Comment

                                            • Phydoux
                                              Senior Member
                                              • Aug 2012
                                              • 83
                                              • United States
                                              #12
                                              Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

                                              I'd be interested to know what the issue was as well. I have the same model (but looks like it may be a different serial number) with the same issues.

                                                Comment

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