Macbook A2289 820-01897-06 M1 Dead

[sourcensolutionsonline@gm]

This Mabook Macbook A2289 820-01897-06 M1 came in dead after severe water damaged , when Connect my amp meter I can see that my 20v DC is ok and pulling 11Watts and 10.5 amps and stuck there , Fan spins but no boot , Can i please get some help ?

Thank you very much .

 

[2informaticos]

Isn't your board 820-01987?

Did you try DFU mode?
Was the board cleaned and corroded components replaced?

 

[sourcensolutionsonline@gm]

correct my mistake my board is 820-01987, I have not tried DFU mode yet , I spotted some corroded areas including the fan connector was gone and i rebuilt it , but all the other places were fine and no shorts found, but i realize that CPU gets hot .

 

[TCRScircuit]

This isn't an M1 board. This is Intel. Also you aren't pulling 10 amps. Post voltage on L7210.

 

[sourcensolutionsonline@gm]

L7210 is giving me 0.847 V on both sides.

 

[sourcensolutionsonline@gm]

any suggestion?

 

[2informaticos]

CPU core sould drop to aprox 0.6V when boots.
I suppose more damage caused by liquid spill.

 

[sourcensolutionsonline@gm]

Ok , does that mean that CPU is my issue , also according to your experience should i review other areas for more corrosion ?

Thank you very much .

 

[2informaticos]

Can be CPU, or accumulated crap under it, or other BGA chip.
A simple corroded resistor can be also enough to block the board.

Did you try DFU at least?

 

[sourcensolutionsonline@gm]

No, I have not yet tried the DFU mode , Would you please provide me with the combination keys to get it into DFU mode ?

Thank you .

I will also review the resistors to see if any of them is corroded.

 

[2informaticos]

HOW TO collection

I hope this "How to" collection will help our members. I will possibly modify this post in time, if updates available. Trigger SMC_ONOFF_L (PMU_ONOFF_L): It reffers to simulate power button function, when the keyboard is not connected. We need to do this when we work with the board...

boards.rossmanngroup.com

 

[sourcensolutionsonline@gm]

Thank you for the informations , i have tried to to get the device in DFU but was not succeded , i wanted to add a short preview video to show you the reaction on the AMP meter , i have added a clear picture . Thats where the device stuck on .

 

[2informaticos]

Did you exactly follow all the steps in the DFU tutorial?
You can force it with SE032 pads.