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820-3115 - Hissing/ticking noise by the lvds connector

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  • #46
    ok noise is gone after injecting voltage to the board.

    it was L6995 lol.. i pretty sure replaced this couple of time.

    now i get a steady 3.4v on PP3V42_G3H instead 3.5v.

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    • #47
      sometime charger doesnt go solid green and doesnt turn on what could cause this?

      when no green light =

      PP3V42 - 3.47V
      SYS_ONEWIRE - 3.46V
      PPBUS_G3H =12.52V
      ADAPTER_SENSE - 3.48v
      PP5V_S5 = 5v
      PP3V3_S5 = 3.32v


      however turns on with battery all the time.


      can a bad L6995 coil damage U6990 or ISL6259 even tho i replaced these 2 chips for 3 times already when trying to find the noise?
      Last edited by Alan.L; 03-09-2017, 10:29 AM.

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