MacBook Air 13" Retina 2018 820-01521-02

Papaj2004 · Oct 17, 2022

MB: 820-01521-A
u4770 bin
Hello. You can check this bin file. Only the backlight starts without image and restart. Thank you.

ThienBui · Oct 17, 2022

Papaj2004 said:
MB: 820-01521-A
u4770 bin
Hello. You can check this bin file. Only the backlight starts without image and restart. Thank you.

it's not BIOS this model uses Apple T2

rymk84 · Mar 2, 2023

ThienBui said:
it's not BIOS this model uses Apple T2

MAC A1932 does not enter 20 volts. I need the bios of the USBC CD315 chip. Corrupted bios attached.

ThienBui · Mar 2, 2023

rymk84 said:
MAC A1932 does not enter 20 volts. I need the bios of the USBC CD315 chip. Corrupted bios attached.

I no have bios for chip this

imranromi · Mar 2, 2023

rymk84 said:
MAC A1932 does not enter 20 volts. I need the bios of the USBC CD315 chip. Corrupted bios attached.

Do dfu mode and restore if T2 firmware corrupt will all ok.

Straight · Jun 7, 2023

Do you have a solution for this in apple a1932

ay_bulut · Oct 17, 2023

A1932 ( 2019 )
820-01521-A
U4770

There was an MDM problem and while trying to change the serial number, it gave an error while taking the bios backup. can you check.

ThienBui · Oct 17, 2023

ay_bulut said:
A1932 ( 2019 )
820-01521-A
U4770

There was an MDM problem and while trying to change the serial number, it gave an error while taking the bios backup. can you check.

now it error what ? Please send one photo I check

ay_bulut · Oct 17, 2023

Ç

ThienBui said:
now it error what ? Please send one photo I check

It works very slowly. fan works fast.

ThienBui · Oct 17, 2023

ay_bulut said:
Ç

It works very slowly. fan works fast.

no problem bios

ay_bulut · Oct 17, 2023

ThienBui said:
no problem bios

There was no problem before changing the serial number

ThienBui · Oct 17, 2023

ay_bulut said:
There was no problem before changing the serial number

So I can't help you change it yourself, so you need to know what's wrong

ay_bulut · Oct 17, 2023

ThienBui said:
So I can't help you change it yourself, so you need to know what's wrong

The chip in the picture was defective, it had this on it. I installed MX25U3235F instead.

ay_bulut · Oct 17, 2023

It was put into DFU mode and restored. The problem is fixed.

Đào Hưng · Jan 22, 2024

a thiện fix e file này đủ nguồn không hình, nạp file cleame của a lên mà ko nhận ổ.

popizdelkiUA · Feb 13, 2024

rymk84 said:
MAC A1932 does not enter 20 volts.

dimpu · Mar 30, 2024

wrong schematic dosent match with boardview

ThienBui · Mar 30, 2024

dimpu said:
wrong schematic dosent match with boardview

not same 820-01521

Kanhaiya L. Patawa · Apr 18, 2024

MAC A1932 does not enter 20 volts.

Kanhaiya L. Patawa · Apr 18, 2024

MAC A1932 does not enter 20 volts.

MacBook Air 13" Retina 2018 820-01521-02

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