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Dell Vostro 5490 - no sound, no audio device

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    #1

    Dell Vostro 5490 - no sound, no audio device

    Hi, i've got problem with Dell Vostro 5490.
    Board - Mantis CML 18788-1

    Windows says "no audio device detected". The other functions work properly.

    What i've done:

    1. I checked motherboard

    2. I changed audio codec (ALC3204)

    3. I reflashed bios with clear ME

    4. Audio is enable in bios

    5. Both speakers are good

    6. After installing the drivers from the Dell website, the devices visible in the manager:
    - Audio for intel displays
    - Intel Smart Sound Technology
    - Intel Smart Sound OED technology
    - Intel Smart Sound Technology Audio Controller

    7. I have already tried all possible replacements and installation of drivers, tips from websites, YT, etc. The new system, actually three different ones - no results.

    8. Measured voltages to ground on the audio codec:
    1 - 3.3V
    2 - 3.3V
    3 - 3.3V
    4 - 0.02V
    5 - 0.07V
    6 - 1.26V
    7 - 0V
    8 - 3.3V
    9 - 0.04V
    10 - 0.15V
    11 - 2.15V
    12 - 3.3V
    13 - 0V
    14 - 0V
    15 - 0V
    16 - 3.1V
    17 - 0.15V
    18 - 0.15V
    19 - 0V
    20 - 5.2V
    21 - 4.4V
    22 - 2.2V
    23 - 0V
    24 - 0V
    25 - 0V
    26 - 0V
    27 - 0V
    28 - 0V
    29 - 1.8V
    30 - 1.8V
    31 - 0V
    32 - 1.3V
    33 - 1.8V
    34 - 5.2V
    35 - 0V
    36 - 0V
    37 - 0V
    38 - 0V
    39 - 5.2V
    40 - 3.3V
    Tags: None
    #2
    Re: Dell Vostro 5490 - no sound, no audio device

    do you have audio output in linux? check the combo jack first

    Comment

      #3
      Re: Dell Vostro 5490 - no sound, no audio device

      Yeah try Live Ubuntu Linux, also Dell Diagnostics will also test sound.

      Comment

        #4
        Re: Dell Vostro 5490 - no sound, no audio device

        Originally posted by rediii View Post
        do you have audio output in linux? check the combo jack first
        Now Combo jack is unplugged.

        Originally posted by sikocan View Post
        Yeah try Live Ubuntu Linux, also Dell Diagnostics will also test sound.
        I tried Live Ubuntu, no output devices, no sound.
        Dell Diagnostics doesn't see any audio devices, no sound.

        Comment

          #5
          Re: Dell Vostro 5490 - no sound, no audio device

          here are the schematics and component pdfs
          Attached Files

          Comment

            #6
            Re: Dell Vostro 5490 - no sound, no audio device

            I've got schematic but i don't have any idea what's next ...

            Comment

              #7
              Re: Dell Vostro 5490 - no sound, no audio device

              I desoldered the audio codec once again and measured the voltage drop on the signal lines 4,5,7 and 9 - 0.6V everywhere.
              It looks like the hybrid is damaged...

              Comment

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