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There is literally 0om... actually i removed those coils to see if the short is on the side of vrms or on the other one, and the short is on the side of cpu but the noise is gone Would try to inject some voltage to see what will heat up, but my power supply is not here yet Thanks for the board...

Just a guess... do by any chances he have maybe access to her router?

Hello friends, Got another macbook air in with liquid damage after another shop... There was some, minor water sign on the board, however not sure if there was more before the other shop played with it (overall the board do appear clean: no flux etc) After cleaning and plugging the power, there...

Update: Mesured the voltage at coils just after the error message and when the screen is on with logo and frezed progress bar and found out that there is no power on L7702 (PPVCCEDRAM_PHASE) Maybe thats why the post does not pass? Any tips on what to look now? The resistance to ground is at 58om

Found that info on this cite: "The SMC performs a Power-On-Self-Test (POST) to detect any EFI or hardware issues such as bad RAM and possibly redirect to Recovery" And since it always stay in recovery, i presume the POST does not run as expected? I guess i will recheck all voltages once again...

I tried to reflow T2 and there is no improvement. Guess its scrap for good now since i cant find any more damages on the board. When buying a used board "for parts", is it always activation locked?

Not sure, i will wait until i receive the replacement one (ordered with the palm rest since the keyboard is scrap as well) because 01598 board does not easily fit in to 00840 case. I guess they blocked the compatibility on the software level... By the way, screens are compatible between those two?

I unfortunatly dont have any good boards :( do you know what readings i should get?

Yes, pin2 of the coil

Mesured some more voltages around the ssd and found that PP2V7_NAND on the L9060 is at 2.48V Wonder if that can explain the issue i am seeing?

In that case the board is scrap? Edit: if we think that the problem is ssd related, in that case why does the mac stay in recovery mode and does not boot to a flashing folder? That lead me to belive that the issue is before ssd

I am getting 0.9v on L9020, 1.8v on L9030 and 2.5v on L9080...

No, and its give me the same error even if i disconnect everything from the board. Going trought power pins on T2 chip, all seams fine except pin 136 SMC_PP3V3_WLANBT_ISENSE, THERE IS 0volt, not sure if its okay Is there a list of voltages that i should look on ssd except PPnVn ?

Was going around the board once again today, and noticed that i am not sure if R6649 was there in the behuining, but its not there anymore Any advice? (Look up the shamatics, but both of them seams to be there?)

The main liquide traces where around: C4527, C4524, C4502, R3975, C4454, U3750, U2021, C2021, U6641, C6641, C6642 And 5V rail: C6482, CD621, CD624, C7671, C7676 All look clean but will take another look tomorrow. However i tested all voltages on all those components (where it should be) and...

Edit: after a couple of try, it went as far as putting apple logo on to the screen with loading bar, but still fail with error 9 (no comunication).. Usbc ports do look clean Edit 2: Okay, after trying a couple of times and with different cables, it finally finished the installation and...

Thanks for schematic @2informaticos! You were right, as soon as i plugged it to apple configurator, it saw it in recovery mode However when i try to do the riveve, it fail with error 78 (no storage) And i get error 9 when i try to do a restore Does this mean the ssd is shot?

Strange, when i connect the battery from 820-01598, the board does not start and i see the voltage start to go up from 5v and then the power supply shuts down and restart from 5volts and it does it in loop.. does that mean the board is not okay then?

Thank @2informaticos! Will order a battery and try it out. By the way, is battery from 820-01598 tha same? Can i try with this one? Seems to have the same connector but not sure if its the same pinout

Hello everyone! I have 820-01598 board which had some small liquid damage. The board does not boot, how ever aparrently it does charge the battery (the ams goes up when the battery is connected). With the battery discconected, there is 20v@0.04amp and slowly goes to 0.01amp and to 0amp...