MBPRO 2020 13” 820-01949 SOCROM *SOLUTION*

[Mortentoft]

I am writing to you dear colleagues because I for a long time and search never found a solution on my macbook pro 2020 820-01949 intel issue which showed prohibitory sign no matter what I tried (Everything was tried with DFU and so on - everything all values were normal on LB and it was a perfectly clean board with no damage. I decided to install a new clean image on a fresh SOC-ROM (think it is U4770 on bv) chip from a 820-00850 donor board. after i have installed it I now can restore it and the machine is running like new. You may know this but I have never tried it before and maybe it can help others.

Have a great week.

 

[2informaticos]

Did you flash 01949 dump into the chip recovered from 00850?
Or just soldered the chip without modifying its content?

 

[Mortentoft]

Hi’ 2informaticos
I flashed 01949 dump into the chip recovered from 00850. I do not think it could work with a dump from another type of board.

 

[2informaticos]

Shouldn't work, that was the reason I asked, to clarify the situation.

Thanks for feedback!

 

[Praveen Sahwal]

Hi
I have 820-01598 board with almost same issue. System is in DFU Mode and all the power and signals looks ok.
tried few time revive and restore but every times it throw an error 21.

Can i know the process of flashing new SOC-ROM please?

Thanks

 

[2informaticos]

Just erase it.
It is automatically reflashed in DFU mode.
Make backup first!