Sammy Plasma PN60F5500AF vs PN51F5500AF Main Boards

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  • Michale32086
    New Member
    • Nov 2011
    • 1453
    • USA
    #1

    Sammy Plasma PN60F5500AF vs PN51F5500AF Main Boards

    Had a 60" Sammy Plasma come in with. Worked fine, but no HDMI ports.. Main Board BN97-07107X...

    Tried a reflow on the board, no luck..

    Had to order a replacement..

    Came across a Main Board with the same # BN97-07107X but it says it was for a Sammy PN51F5500AF..

    I figured it was close enough..

    Now I think I figured wrong..

    When I put in the new board the TV doesn't give me a display at all.. Power LED blinks a few times, then goes out, then blinks a few times.. But nothing on the display...

    One thing I did notice on the replacement board.. The heat sink is normally very secured to the chip.. This one is able to be lifted off with the barest pressure..

    So, either I got a bad board or it's simply a case of it being the wrong board..

    If it's the latter, is there a chip I can swap out from the old board to the new board to make it compatible??

    Thanx in advance for any help..
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    • Michale32086
      New Member
      • Nov 2011
      • 1453
      • USA
      #2
      Re: Sammy Plasma PN60F5500AF vs PN51F5500AF Main Boards

      OK Update on this..

      I was thinking I could swap out the BIOS chips of the two boards.. Have had success on that before. THAT got me thinking of just doing a firmware upgrade.. So I tooled around for the firmware and discovered that the firmware for all the PNxxF5500 series is identical. Which kind of shoots down my theory that swapping out BIOS chips may fix the problem..

      Then it occurred to me that simply doing a firmware upgrade might help..

      Did the upgrade on the board with no HDMI.. No help..

      Can't seem to do the upgrade on the P51 Main Board because it doesn't appear to get that far along in the boot up process to start the update..

      So, I am kinda stumped here and leaning more towards a bad P51 Main Board.

      Another tidbit of info became available however.. There is a green LED in the middle of the Main Boards.. When the P51 board is installed, that LED does 5 blinks, then a large pause.. 5 blinks, large pause.. etc etc..

      Although I can swear to it (going to confirm in a sec) I believe that the working Main Board, the LED just blinked on and off steadily...

      Hopefully this LED is an error code that will allow me to confirm that the P51 board is, indeed, bad..

        Comment

        • Michale32086
          New Member
          • Nov 2011
          • 1453
          • USA
          #3
          Re: Sammy Plasma PN60F5500AF vs PN51F5500AF Main Boards

          OK I can confirm that the green LED in the middle of the Main Board blinks steadily under normal operation...

          In confirming this, THIS happened to the TV..

          I have a feeling (Hoping) it's something simple like a mis-alignment in the connector pictured.

          But, to be honest, I totally stressed out about this as this TV is supposed to be ready by Noon for the Jaguars game.

          I am going to put it aside and get in a better frame of mind...
          Attached Files

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