Serial Number missing on MBP 2012 Retina

[Roman78]

I just got a defective MBP 2012 Retina here. I resoldered the U8900 and it is working again, but now the Serial Number is missing. I downloaded several Blank Board Serializer from different sources and restored those on a USB-Stick. But non is working, all giving following error:

Error: 8000000000000003, Cannot load 'EFI/Drivers/TestSupport.efi'
Status: 0x00000003

On here : https://de.ifixit.com/Antworten/Ansehen/568059/MacBook+Pro+2013+-+cannot+load+Apple+Hardware+Test i found it has something to do whit the newer Firmware.

Now i need a newer version of BBS a way to restore the Serial in the EFI-Chip. I found a 25Q064A on the logicboard an i own a CH341A.

What to do?

 

[CuchoM]

I just got a defective MBP 2012 Retina here. I resoldered the U8900 and it is working again, but now the Serial Number is missing. I downloaded several Blank Board Serializer from different sources and restored those on a USB-Stick. But non is working, all giving following error:

Error: 8000000000000003, Cannot load 'EFI/Drivers/TestSupport.efi'
Status: 0x00000003

On here : https://de.ifixit.com/Antworten/Ansehen/568059/MacBook+Pro+2013+-+cannot+load+Apple+Hardware+Test i found it has something to do whit the newer Firmware.

Now i need a newer version of BBS a way to restore the Serial in the EFI-Chip. I found a 25Q064A on the logicboard an i own a CH341A.

What to do?

Use this AST_BBS_1_1.rar Download (1.77 MB) Make USB using balenaEtcher-1.5.102 boot insto BBS and it works automatic

 

[captin007_1]

Just tried the above and it worked perfectly on my MacBook Pro (Retina, 15-inch, Late 2013) with Big Sur 11.2.2