Macbook A2485 820 02100 Water damaged

[sourcensolutionsonline@gm]

Hello,

I am looking for assistance for this macbook M1 Pro came in with water damaged and owner waited till after 3 weeks to bring it to repair , the front motherboard was looking fine but the back of the motherboard was looking terribly bad , I managed to clean the motherboard using OCA 8333 , but i spotted that 3 of the audio amps were spotted very bvadly corroded, I have reflown the area and i was able to clear off a partial short , i did not change any components but now macbook can be heard powering on sound and giving an apple apple logo then computer would go to restore mode, if I do command R and power button it would not allow me to go into DFU mode at all , please help me out , i have attached a few pictures to show the state that the macbook came in .

Thank you very much.,

 

[2informaticos]

DFU Mode Restore (Macs) - LogiWiki

We have Apple MacBook and iPhone Diode readings and general fault finding information compiled by the leaders in this area

logi.wiki

 

[sourcensolutionsonline@gm]

I have tried all the DFU method and macbook refused to get into DFU, i am not sure if that could be a nand failure , would you suggest some power rails that could be be the culprit?

Thank you

 

[sourcensolutionsonline@gm]

any words for me ?

 

[2informaticos]

"command R and power button it would not allow me to go into DFU mode"
That is not the way to go into DFU.
Did you try external switch method?

 

[sourcensolutionsonline@gm]

I did , and still going not allowing me.

 

[2informaticos]

What happens when you try the classic method, with just power button?
This machine gives even video, so should enter DFU...

 

[sourcensolutionsonline@gm]

When I try classic method , it would give the apple logo then few seconds it would go to the restore screen again and it does the same when i ran the jumpers method too.

 

[sourcensolutionsonline@gm]

Hello , I was able to get that macbook in DFU MODE , However , i am getting this error message saying system can not be restored on this device, libusbrestore error:21
-ox15(21)
I reviewed all the nand lines and they are all fine as we checked last time , but still getting error while restoring.
Can i get any help please?

 

[2informaticos]

You may have corroded traces, or solders under NAND chips.
Also possible internal damage of NANDs.

Check all components from page 12.
Just in case, try reflashing SPI NOR; make backup first.

 

[sourcensolutionsonline@gm]

Hello ,

funny thing is all the nand lines voltages are normal .