Panasonic TX-L42U2E 7 blinks SUB3.3V_SENSE_SOS

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  • unxtres
    Member
    • Aug 2017
    • 20
    • United Kingdom
    #1

    Panasonic TX-L42U2E 7 blinks SUB3.3V_SENSE_SOS

    Hello

    TV blinks 7 times

    aboard - TNP8EA106
    PBoard - TNP8EP103

    replaced A6059H (IC802) on PBOARD and also new flashed nand +eeproms on ABOARD
    NAND=IC8921 - H27U1G8F2BTR
    IC1101-24C16
    IC8950-24C32

    tv still flashes there is only 5v on pboard
    maybe someone got experience with similar problem

    service manual attached.
    Attached Files
    Last edited by unxtres; 01-22-2021, 02:19 PM.
    Tags: None
    • unxtres
      Member
      • Aug 2017
      • 20
      • United Kingdom
      #2
      Re: Panasonic TX-L42U2E 7 blinks SUB3.3V_SENSE_SOS

      Because there is a two relays on pboard 5v trigger them i`ve decided to check them, both was fine when powered with 5v and now when i turn on tv it goes stady green than green start flashes quickly and goes to 10 red blinks

      for few moments there are 24 and 12 on board so i can assume pboard is fine and there is a problem on main.

      Just reheated cpu to see if this will make any changes.

      Edit:

      CPU heating gives nothing red light flash 10 times
      Last edited by unxtres; 01-22-2021, 04:14 PM.

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