820-00281 EFi Padlock remove

[2informaticos]

You've probably forgot to erase the SSD.

The notes from Dukefawks:
"There are 2 instances of $SVS in the binary. One will have a bunch of crap after it and the other won't.
Make the one that has a bunch of crap look like the one that doesn't.
Make sure you keep an original copy in the case you screw up!
After the fix do a PRAM reset and install new OSX!"

 

[Kappy]

Yes, that is basically what I've been doing in the past but i cannot install/erase SSD or do a PRAM reset. I just wanted to check if there was a different method for the A1707

 

[2informaticos]

Test with known good keyboard.

Also, if you have Medusa programmer, it can do PRAM reset.

 

[2informaticos]

EFI password and iCloud are different things...

 

[Kappy]

Dukefawks says

"There are 2 instances of $SVS in the binary. One will have a bunch of crap after it and the other won't.
Make the one that has a bunch of crap look like the one that doesn't.
Make sure you keep an original copy in the case you screw up!
After the fix do a PRAM reset and install new OSX!"

What he means is

bunch of crap = hex digits aka locked data
one that doesn't = FF

Basically replace the 'bunch of crap' with 'FF' which is what i've always done in the past, and it's worked fine. In this instance, after replacing the hext digits with 'FF', the 'bunch of crap' is added by the system when you power on the Macbook. So to get round this problem i added the 'bunch of crap' from a non-locked donor a1707 macbook.