[help] A1466 820-3437 NO AUDIO!!

[phantomEVO]

P1V5S0SW_AUDIO_EN present

PP1V5_S0SW_AUDIO present

all diodes readings on j9500 present and perfect

HDA_SDOUT R1313 33ohm
HDA_SDOUT_R R1921 1kohm
HDA_SYNC R1311 33ohm
HDA_BIT_CLK R1310 33ohm

HDA_RST_L present

changed I/O Board and flat...no luck


no audio peripheral avaible in the system

maybe smc rework before by someone else

any help?

[Kuroneox]

Re: [help] A1466 820-3437 NO AUDIO!!

I don't know much English, but the audio failure of that model, for me, has been related to the flex, io board and board connector. really try changing io board

[reformatt]

Re: [help] A1466 820-3437 NO AUDIO!!

Audio codec is on the DC IN board. Try a PRAM reset first, then make sure you are using a known good DC IN board and flex cable.

Often see corrosion at the base of J9500 too. Check signals at each pin like AUD_PWR_EN etc.

[phantomEVO]

Re: [help] A1466 820-3437 NO AUDIO!!

I have Already changed dc board And flex like i said before…

There is no corrosion on j9500

Signal are present like i said

[piernov]

Re: [help] A1466 820-3437 NO AUDIO!!

I think wrong SMC (from 3209) may cause no audio on these. Can try to reflash SMC firmware at least, or replace from another 3437.

[phantomEVO]

Re: [help] A1466 820-3437 NO AUDIO!!

How to re flash?

[reformatt]

Re: [help] A1466 820-3437 NO AUDIO!!

Good point Piernov. I know that using a SMC from a 820-3437 donor for a 820-00165 board causes that.

Reflash the SMC firmware from https://github.com/MuertoGB/SMCTool/releases

[phantomEVO]

Re: [help] A1466 820-3437 NO AUDIO!!

Awesome? What type of Programmer should i use? Where can i find some tutorial?

[reformatt]

Re: [help] A1466 820-3437 NO AUDIO!!

It's a DMG file, just create a bootable USB with it and boot off it. Menu is pretty self explanatory. Further info here:

https://www.youtube.com/watch?v=q8LEh8C4iYo