Philips 42PFL5603D/12, no image but LED

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  • Behemot
    Badcaps Legend
    • Dec 2009
    • 4845
    • CZ
    #1

    Philips 42PFL5603D/12, no image but LED

    When I turn it on, first LED (white) ligths for like a minute even though I have no image. I got +12 V, -12 V and +3,3 V (seems like stand-by) all-right. Than the red LED starts blinking and voltages disappear.

    Capacitors measure OK. I tried looking for some image with a lamp but found nothing. Maybe I just missed it and there is something but backlight is definitelly not working.

    It occurs to me the CCFL power is actually derived from high on primary side, not the usual way high-low-high.
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    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Philips 42PFL5603D/12, no image but LED

      Count red blinks between each pause, if any. It is usually an error code for Philips TVs.
      Check BLON signal between main board and power board. No BLON (0V), no backlight.
      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

        • Behemot
          Badcaps Legend
          • Dec 2009
          • 4845
          • CZ
          #3
          Re: Philips 42PFL5603D/12, no image but LED

          I noticed the white LED blinked/turned on 3 times, possibly the TV was restarting itself 3times? Than the red one started blinking, 5times slowly and 3times fast, this sequency was repeating.

          Which one is BLON? There is no marking on the power board…
          Last edited by Behemot; 06-02-2014, 12:45 PM.
          Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK
              #4
              Re: Philips 42PFL5603D/12, no image but LED

              What is the TV's chassis code? e.g. LC4.2E-PA?
              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

                • Behemot
                  Badcaps Legend
                  • Dec 2009
                  • 4845
                  • CZ
                  #5
                  Re: Philips 42PFL5603D/12, no image but LED

                  sq522.2e la
                  Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Philips 42PFL5603D/12, no image but LED

                      Schematic and service manual here:


                      Schematic of power board on page 52. BLON is pin 5 of CN7.
                      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

                        • Behemot
                          Badcaps Legend
                          • Dec 2009
                          • 4845
                          • CZ
                          #7
                          Re: Philips 42PFL5603D/12, no image but LED

                          I found the manual, it blinks error 53 which says

                          Error 53. This error will indicate that the PNX85xx has read his bootscript (if this would have failed, error 5 would blink) but initialization was never completed because of hardware problems (NAND flash, ...) or software initialization problems. Possible cause could be that there is no valid software loaded (try to upgrade to the latest main software version). Note that it can take up to 2 minutes before the TV starts blinking error 53.
                          Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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                            • dellxps15
                              Badcaps Legend
                              • Feb 2014
                              • 1585
                              • italy
                              #8
                              Re: Philips 42PFL5603D/12, no image but LED

                              hi, have u found a solution to your problem ?

                                Comment

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