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Old 05-11-2020, 10:43 AM   #1
Richi_el
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Default BIOS MacBook A1398 MB 820-5482A serial change not work

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
Attached Files
File Type: zip A1398_820-5482_MacBook_bin.zip (9.84 MB, 5 views)
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Old 05-12-2020, 03:40 AM   #2
Claudiomfa
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Default Re: BIOS MacBook A1398 MB 820-5482A serial change not work

try and report
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File Type: rar A1398_820-5482__MacBook_Original_SN_Changed.rar (4.41 MB, 3 views)
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Old 05-12-2020, 04:27 AM   #3
Richi_el
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Default Re: BIOS MacBook A1398 MB 820-5482A serial change not work

hello,

thanks for first.

but file wasnt working, the book is still rebooting by apple logo
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Old 05-12-2020, 05:10 AM   #4
piernov
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Default Re: BIOS MacBook A1398 MB 820-5482A serial change not work

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.
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Old 05-12-2020, 05:35 AM   #5
Richi_el
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Default Re: BIOS MacBook A1398 MB 820-5482A serial change not work

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
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