Philips 32PF7320A/37 won't turn on, 7 blinks

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  • cammac725
    Member
    • Mar 2009
    • 27
    #1

    Philips 32PF7320A/37 won't turn on, 7 blinks

    Hi

    I've got this Philips 32PF7320A/37 TV that was given to me. When the power cord is plugged in, nothing happens for about five seconds then I hear a click and the power light starts blinking 7 times repeatedly. I have been unable to find out what that blink code is for this model.

    I looked at the boards but see no caps that look bad. I replaced all the caps on the power board with Nichicon caps...no joy.

    The "click" I hear when plugging it in comes from the component circled in pic 1, and I have tested the 2 fuses indicated in pic 1, they are good. (I hope the pics are good enough. The board is 15" long so I split the pics.)

    I don't know where to go from here. Any help would be appreciated.

    Cam
    Attached Files
    Tags: None
    • Mr Bill
      Badcaps Veteran
      • Nov 2011
      • 648
      • USA
      #2
      Re: Philips 32PF7320A/37 won't turn on, 7 blinks

      Is Ic7001 MC34067P? Can't tell from 100% from the pictures. If it is Check Pin 4 (ground) to Pin 15 (Vcc) and see if it's shorted.
      Attached Files

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        • cammac725
          Member
          • Mar 2009
          • 27
          #3
          Re: Philips 32PF7320A/37 won't turn on, 7 blinks

          Thanks, Mr Bill

          yes, it is MC34067P.

          With board isolated, pin 4 to pin 15 is open.

          With board installed, pin 15 to chassis gnd is 20v, while LED blinks 7x.
          When power applied, pin 15 to pin 4 is 15v, which drops slowly to 1.5v after shutdown.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: Philips 32PF7320A/37 won't turn on, 7 blinks

              Is there a chassis number on the model number sticker on the back of the TV?
              Never stop learning
              Basic LCD TV and Monitor troubleshooting guides.
              http://www.badcaps.net/forum/showthr...956#post305956

              Voltage Regulator (LDO) testing:
              http://www.badcaps.net/forum/showthr...999#post300999

              Inverter testing using old CFL:
              http://www.badcaps.net/forum/showthr...er+testing+cfl

              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
              http://s807.photobucket.com/user/budm/library/

              TV Factory reset codes listing:
              http://www.badcaps.net/forum/showthread.php?t=24809

                Comment

                • cammac725
                  Member
                  • Mar 2009
                  • 27
                  #5
                  Re: Philips 32PF7320A/37 won't turn on, 7 blinks

                  Chassis number is BL2.3U AA

                    Comment

                    • cammac725
                      Member
                      • Mar 2009
                      • 27
                      #6
                      Re: Philips 32PF7320A/37 won't turn on, 7 blinks

                      Well, I ended up replacing the power board because it looks like I damaged the board when replacing one of the caps, but I still have the exact same problem. Voltages are still the same also.

                        Comment

                        • Shane711
                          Badcaps Veteran
                          • Dec 2014
                          • 493
                          • USA
                          #7
                          Re: Philips 32PF7320A/37 won't turn on, 7 blinks

                          I have this TV and I have narrowed the problem down to the scaler board. I am not sure if it can be repaired. It seems it is an overheating issue or the bad component is getting too hot. If I put a fan across the circuits the TV stays on. I am not sure if it will be a good idea to get another scaler board unless I can figure out how to prevent it from going bad. I am thinking maybe a heat sink on the main IC. Even a square copper block tall enough to reach the top cover with heat paste on both ends might do the trick.

                          It seems to me this TV is not worth fixing so I think I am going to disassemble it and put the panel on eBay for sale.
                          Attached Files
                          Last edited by Shane711; 05-20-2015, 02:50 PM.

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