IMAC 820-00967 power issue

[sav20]

Guys have an imac 820-00967 with no power, no image or fan activity, when connected to another macbook via USB it displays device in recovery, I did revive and reset on configurator app but fails with storage or disconnect errors.


Here are some measurements taken

PP12VR11V_MAIN 11.9v
PP3V3_G3H= 3.3v
PP1V1_SLPS2R 1.0v
PP1V8_SLPS2R 1.7v
PP1V2_AWAKE 1.1v
PP3V3_AWAKE 3.3v
PP1V8_AWAKE 1.7v
PPVDDCPUSRAM_AWAKE .7v
PPVDDCPU_AWAKE_SOC .7v

SOC_USB_VBUS 1.6v
PP12V_ACDC_GPU .5v
PP3V3_G3H 3.5v
PP3V3_G3W 0v
PP3V3_G3S 0v
PP1V8_SLPS2R 1.7v
PP0V82_SLPDDR .7v


Thanks

 

[2informaticos]

First of all, welcome to the forum!

Any history available?
Can you post a picture of DFU error?

 

[sav20]

imac was taken in for cleaning and thermal paste replacement, came back in 2 weeks later no power. we checked all around and we could not find any missing components or damage on it. eventually through all the motherboard in and out from the case L6170 and L6160 came off, ill put them back later.... but i don't think this has anything to do with power or the recovery process. I'll like to add I tried another SSD.

please advise

 

[2informaticos]

L6160/70 can't impede the machine to boot.

You may have problems with the SSD connectors.
Check for knocked off component, or broken trace.

 

[sav20]

so i checked all around the board specially SSDs area I don't see missing components or tracks. i checked PP3V3_G3W_SSD0 line its 0v all the time except when i run restore, it goes high at 3v. I assume SSD are getting power. please advice

 

[2informaticos]

What macOS do you have on the host machine?
Where AC2 is running.

Any idea what macOS is on the target (iMAC)?