BIOS MacBook A1398 MB 820-5482A serial change not work

[Richi_el]

Hello,

can someone help me please?

I ve tried to change the ssn of a board from a macbook bios with uefi but it doenst work.

With the original bios the book is working.

When i flash the changed ssn file, the macbook always do looping (restart) by apple logo.

i also checked the checksum but still the same.

i uploaded the original and the modified bin files here.

Thank you for support

[Claudiomfa]

try and report

[Richi_el]

hello,

thanks for first.

but file wasnt working, the book is still rebooting by apple logo

[piernov]

The new serial number is for an MBA 13" 2013 so there's probably a mistake there.
Also 820-5482 is the RIO board number, the MLB should be 820-00138.

[Richi_el]

Hi , maybee the reason of bootloop issue is the battery status.

the battery was totally decharged, i try to charge it a while and test it again.

i will repost when i test it again.

regards