Imac 21.5 A1418 (EMC 2544) - No soud After install parallels

[smiba]

What does the system's audio settings say? Can it find the device or does it not show any outputs?

Already tried booting from a external hard drive to verify the issue is not with the installation? Since I still doubt that software caused audio hardware to break, at best it was just bad luck that it happened around the same time

 

[Noguinfor]

yes, i already try from external drive and other disk in main! I've already checked some voltages and it seems to me that everything is fine. I just did not try to change the columns .. because I do not have any for this model.

some photos:

https://drive.google.com/file/d/0BxEM0L3NRTCOTlZGanFGcDRaOTA/view?usp=sharing

https://drive.google.com/file/d/0BxEM0L3NRTCOY1U0VkZVd2gyaTg/view?usp=sharing

 

[aprendiz]

Which bios file did you use???

 

[Noguinfor]

I used the bios that you gave to me. already cleaned ME ... This machine comes to me with a problem NO Sound! But i think the problem is the bios and i try to programmer and fuck the original bios.. I think the bios is not the problem..

 

[Noguinfor]

any ideia??

 

[dukefawks]

Nope, get another programmer first.

 

[smiba]

Does the audio work over headphones?

 

[Noguinfor]

I already have a new one.. EZP2013 and new SOIC adapter.

https://drive.google.com/file/d/0BxEM0L3NRTCOd1QtZWcwemNiTzQ/view?usp=sharing

When I programmed bios with these new items the machine worked. this programmer notes that is much better because to program and much slower.


Service Diagnostics 3S152 passed all testes! no errors.

 

[Noguinfor]

don't work with headphones too !

 

[smiba]

Alright so something freaky is going on with the Audio Codec U6101. Its probably not something much further down the line because both channels are not working.

What are the voltages of the following traces (Probe close to the chip):
- PP3V3_S0_AUDIO
- PP4V5_AUDIO_ANALOG
- PP5V_S0_AUDIO

 

[dukefawks]

It is just a software issue with parallels. Just uninstall it. If it works in OSX there is nothing wrong with the hardware.

 

[Noguinfor]

But i just was replaced a HD with osx sierra! was not it supposed to sound with him? And when i press the button to start, it does not a common sound..

 

[smiba]

What are the voltages of the following traces (Probe close to the chip U6101):
- PP3V3_S0_AUDIO
- PP4V5_AUDIO_ANALOG
- PP5V_S0_AUDIO

Please post these results so we can rule out the codec

 

[Noguinfor]

- PP3V3_S0_AUDIO - 3.32
- PP4V5_AUDIO_ANALOG - 4.4V
- PP5V_S0_AUDIO - 4.98V

This board passed all tests in ASD... I think if that was a problem Hardware wasn't passed all tests!!

 

[dukefawks]

Audio output device recognized in OSX? Can volume be adjusted?

 

[Noguinfor]

yes i can adjust volume... i put some photos:

https://drive.google.com/file/d/0BxE...ew?usp=sharing

https://drive.google.com/file/d/0BxE...ew?usp=sharing

What a fucking problem ... I wish water had fallen on it... any more idea ??

 

[dukefawks]

Seems like a dead codec. I advice you to get a USB sound device.

 

[Noguinfor]

Ok, you means install widows and get the codecs right?

 

[dukefawks]

I do not support Windows on Apple devices, but it will probably work. Will need external speakers of course.

 

[smiba]

If you feel like repairing the board instead of getting a USB audio card you can replace the chip (U6101)

If you want to be sure that the chip is actually malfunctioning you can check the signal of HDA_SDOUT with a oscilloscope (It should differ when playing audio vs. playing nothing). If there is no signal at all the codec is not receiving any audio information and thus not malfunctioning.
You might also check PP1V5_S0_AUD_DIG and the 3 other power lines you checked earlier right at the chips pins to exclude the chance of it being a broken trace (very unlikely)

But again like duke said you can also just get a USB audio device as output, but not sure if the customer would be happy with that. Its up to you/them