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No Audio or Chime 820-3209-A

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  • No Audio or Chime 820-3209-A

    Have changed the I/O board, but not sure it´s 100% ok, bought a used one on ebay. No hardware detected, have reset nvram/pram, changed flex cable. But it detects my EZCAST which is on the same network connected to my tv, nor detection of headphones. Otherwise the air works flawless even usb on I/O board.

    Any suggestions where to start

    I saw the bios has been tampered with, It also was the wrong flex cable between the I/O board and MLB.

    Thanks
    Last edited by mcrozz; 01-24-2019, 02:32 PM.

  • #2
    Did you try known good LIO flex too?
    Check LIO connector on the MLB too.

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    • #3
      When I bought the LIO from ebay it came with a new flex. Well, connector looks fine on both sides (under scoope). there is no signs of liquide anywhere. Not sure what to meassure.

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      • #4
        Check if voltage from pins 7 & 9 of J4700 arrive to LIO board.
        Be sure HDA_RST_L stays high.
        Also check resistance to ground (diode mode) on all HDA_ lines...

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        • #5
          Hi Sri if it going slow, stuck with flue.....will take a ffew days to get back with results.

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