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820-4924 - Low sound after codec replacement

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  • 820-4924 - Low sound after codec replacement

    Hi guys

    I got this 4924. It came in with no chime and no sound and no audio devices shown in audio settings. No liquid. Just stopped working one day.

    I opened it up and the Cirrus audio chip got a hole burned in it. So I just replaced it. This brought the sound back but at low volume. I made a PRAM reset and the chime is also lower volume than normally. And also the quality of sound is not perfect when playing music.

    Cirrus chip was taken from a junk board and reballed. Is something wrong here or could it be something else??

    Thanks

  • #2
    Burnt chip could damaged the series resistors/coils from power rails.
    Higher value for serie resistor can lower the voltage for the codec...

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    • #3
      Took another codec chip from another scrap board. Reballed again. Replaced again. And now it is working

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