Apple MacBook Pro A1502 (820-3476-A)

[rensopineda]

Hello friends!
I have a macbook A1502
820-3476-A EMC2875
SN: C02N5B75G3QH.
With the EFI chip damaged by humidity, it cannot be read, it is shorted.
Could you help me with EFI dump?
Thanks

[Xiran]

Hello friends!
I have a macbook A1502
820-3476-A EMC2875
SN: C02N5B75G3QH.
With the EFI chip damaged by humidity, it cannot be read, it is shorted.
Could you help me with EFI dump?
Thanks

Hi @rensonpineda,

You can check right here, there are dumps of what you ask for. But if it is shorted, you have to unsolder it, and check it, if it is the integrated one, you will have to change it.

[rensopineda]

Hi @rensonpineda,

You can check right here, there are dumps of what you ask for. But if it is shorted, you have to unsolder it, and check it, if it is the integrated one, you will have to change it.

Remove the IC from the board, it is dead and cannot be read. I already have a new IC ordered from eBay to reprogram with a new dump that has a clean ME, that's why I have asked for help here, so as not to write any dump and give the board so much heat.

[Xiran]

Remove the IC from the board, it is dead and cannot be read. I already have a new IC ordered from eBay to reprogram with a new dump that has a clean ME, that's why I have asked for help here, so as not to write any dump and give the board so much heat.

I have exactly the same card, what is the advantage of using it with clean ME?

[Xiran]

Remove the IC from the board, it is dead and cannot be read. I already have a new IC ordered from eBay to reprogram with a new dump that has a clean ME, that's why I have asked for help here, so as not to write any dump and give the board so much heat.

Can I ask you a favor? Could you take a photo of your battery from the front and back?
Thanks in advance.

[Duvelhedz]

Here is a version with clean ME region that can be serialised using the Apple Blank Board Serialiser software from a USB drive.
Just flash and use the BBS software to set the serial number. Checksums will pass just fine. This is a post 2018 ROM so will naturally have APFS support.

[Xiran]

Here is a version with clean ME region that can be serialised using the Apple Blank Board Serialiser software from a USB drive.
Just flash and use the BBS software to set the serial number. Checksums will pass just fine. This is a post 2018 ROM so will naturally have APFS support.

Thx!

I´ll check it, one question, did you have the commands to do it without desolder and resolder the chip? I´ve do this around 50 time or more in my board testing diferent bios... =(

[dennis akumu]

Macbook pro A1502 With no display, need clean me plizz
board/no: 820-3476-A.
S/N: C02M4JB9FH00
ME865N

[peste]

Macbook pro A1502 With no display, need clean me plizz
board/no: 820-3476-A.
S/N: C02M4JB9FH00
ME865N

try..

[virusjez]

pls clear me..very slow..after i change smc
SN:C02N38DNG3QH

[peste]

pls clear me..very slow..after i change smc
SN:C02N38DNG3QH

post full name and model, motherboard model, EMC,etc.

[xZINTANIx]

Apple MacBook Pro A1502 (820-3476-A)

Macbook pro A1502
Main-Board : 820-3476-A
Serial n° : C02N655DG3QH
EMC2875

can anyone could help me. my macbook doesn't boot anymore my bios files got corrupted after i tried to remove the efi lock

I need the file and someone to guide me to flash it

[xZINTANIx]

**[HELP] MacBook Pro A1502 - 820-3476-A - BIOS Corrupt - Need Clean Dump**
Hello everyone,

My MacBook Pro A1502 (EMC 2875) won’t boot anymore after I attempted to remove the EFI lock and accidentally corrupted the BIOS.

🔧 Specs:
- Model: MacBook Pro Retina A1502
- Logic Board: 820-3476-A
- Serial Number: C02N655DG3QH
- EMC: 2875

I’m looking for:
- A **clean BIOS dump** for this board
- Preferably with **EFI/iCloud lock removed**
- And guidance on how to **flash it using CH341A and SOIC8 clip**

I'd appreciate any help, links, or step-by-step instructions.
Thanks in advance 🙏

[Aries Molinar]

**[HELP] MacBook Pro A1502 - 820-3476-A - BIOS Corrupt - Need Clean Dump**
Hello everyone,

My MacBook Pro A1502 (EMC 2875) won’t boot anymore after I attempted to remove the EFI lock and accidentally corrupted the BIOS.

🔧 Specs:
- Model: MacBook Pro Retina A1502
- Logic Board: 820-3476-A
- Serial Number: C02N655DG3QH
- EMC: 2875

I’m looking for:
- A **clean BIOS dump** for this board
- Preferably with **EFI/iCloud lock removed**
- And guidance on how to **flash it using CH341A and SOIC8 clip**

I'd appreciate any help, links, or step-by-step instructions.
Thanks in advance 🙏

Try this one
flash the bios using the attached bin file
PRAM reset 2-3x