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/Anse...+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?
Error: 8000000000000003, Cannot load 'EFI/Drivers/TestSupport.efi'
Status: 0x00000003
On here : https://de.ifixit.com/Antworten/Anse...+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?
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