Phillips 42PFL7422D/37 2 seconds to black/flickering screen

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  • eagle00799
    Badcaps Veteran
    • May 2012
    • 322
    • USA
    #1

    Phillips 42PFL7422D/37 2 seconds to black/flickering screen

    Hello everybody, I have this Phillips LCD TV 42PFL7422D/37 that I am attempting to repair. When I first got it and plugged it in it was completely dead, no power lights, no clicking, no nothing. I checked the fuse on the power supply and it was fine, I found a used ps on ebay for $18 bucks and ordered it. Now I get 2 seconds to black (sound but no picture)but during those 2 seconds the whole screen is flickering and the right side is a lot darker. I checked voltages at the inverters and I am getting 22.1V, it should be 24V. Is 22.1V close enough or not? And the red indicator light does not work but when I push the power button the blue light comes on, I do get the 5.6V stand by voltage but the red light does not work. Maybe it's an option in the menu to turn the indicator light off or on like my Vizio has?? Any suggestions? I have included some pics including the old power supply, the new(used) power supply is a different variation but according to ShopJimmy it will work.
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    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Phillips 42PFL7422D/37 2 seconds to black/flickering screen

      22V is not sufficient.
      Did you get *exactly* the right board?
      37" board will not work for example, cannot deliver sufficient power to light 42" panel.
      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

        • eagle00799
          Badcaps Veteran
          • May 2012
          • 322
          • USA
          #3
          Re: Phillips 42PFL7422D/37 2 seconds to black/flickering screen

          the number on the old board is 310432848911 and the board from ebay is 310432848913, every site I have visited says the 8913 is a substitute for the 8911.

            Comment

            • eagle00799
              Badcaps Veteran
              • May 2012
              • 322
              • USA
              #4
              Re: Phillips 42PFL7422D/37 2 seconds to black/flickering screen

              http://www.ebay.com/itm/171797935286...%3AMEBIDX%3AIT

                Comment

                • eagle00799
                  Badcaps Veteran
                  • May 2012
                  • 322
                  • USA
                  #5
                  Re: Phillips 42PFL7422D/37 2 seconds to black/flickering screen

                  I can install the old power supply and try to find the problem with it. I see someone had success replacing the ceramic resistors maybe a good place to start. The last picture in ,my original post is the original power supply, Any suggestions?

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Phillips 42PFL7422D/37 2 seconds to black/flickering screen

                      I see different components on the two boards, so I am not confident they are interchangeable.
                      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

                        • eagle00799
                          Badcaps Veteran
                          • May 2012
                          • 322
                          • USA
                          #7
                          Re: Phillips 42PFL7422D/37 2 seconds to black/flickering screen

                          Yes there are only 2 ceramic resistors on the one I ordered and 4 on the old one. If I put the old board back in where would be a good place to start?

                            Comment

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