Dell Vostro 5490 - no sound, no audio device

[Piaskos]

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

[rediii]

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

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

[sikocan]

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

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

[Piaskos]

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

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

Now Combo jack is unplugged.

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.

[rediii]

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

here are the schematics and component pdfs

[Piaskos]

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

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

[Piaskos]

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...