Apple MacBook Pro A1502 (820-3476-A)

[crowntoy99]

helo

frinds
Apple MacBook Pro A1502 (820-3476-A)
serial c02p228mg3qt
efi password ples remove

[highpulse]

here it is , assuming its not stolen :P

[crowntoy99]

thank you
highpulse

[guruji]

are these vinafix files working and is the machine boots well

[bushmann]

I has been try file from vinafix on model A1502 EMC2875 820-3476-A 2014-2015 and macbook slow startup and freeze if install OS.

[SMDFlea]

Originally Posted by bushmann

I has been try file from vinafix on model A1502 EMC2875 820-3476-A 2014-2015 and macbook slow startup and freeze if install OS.

Try this one.

[bushmann]

I tried more versions with 138.Bxx, but still the same problem that I freeze on the first screen and no response.

The only version with 142.Bxx "works" will also freeze on the first screen, but the speaker will sound "select language for installation".
If I use the up and down keys, the language changes and I hear it, but I only see the first apple screen.
As if the graphics card did not initialize.

If I use the original BIOS, the graphics will switch to the screen where I will write that the machine was blocked.
I warn that he does not want a password.
I know how to delete the password.

Can anyone advise me what to change in original BIOS dump.

I had this problem once and I had to rewrite the original BIOS.
I paid enough money for it.

[yashjovi]

Originally Posted by SMDFlea

Try this one.

this bios have password
do you have password
but this bios working fine but asking password

[johnnybeast]

Originally Posted by bushmann

I tried more versions with 138.Bxx, but still the same problem that I freeze on the first screen and no response.

The only version with 142.Bxx "works" will also freeze on the first screen, but the speaker will sound "select language for installation".
If I use the up and down keys, the language changes and I hear it, but I only see the first apple screen.
As if the graphics card did not initialize.

If I use the original BIOS, the graphics will switch to the screen where I will write that the machine was blocked.
I warn that he does not want a password.
I know how to delete the password.

Can anyone advise me what to change in original BIOS dump.

I had this problem once and I had to rewrite the original BIOS.
I paid enough money for it.

Hey mate,

Try this file, I had to use this to get a Fledging SSD working on a Macbook Pro that was running 0138 EFI Bootrom.

This is EFI Bootrom revision 0151 for the 820-3476 A1502 MacBook Pro 2013/4. The ME Region is clear on it and there's no passwords set.

You must us a HEX Editor to change the serial number at block 63043B, it's currently set to 11111111111 so it will NEED to be changed.

Also, within the first few boots you will need to reset the PRAM, which is holding the P, R, ALT (Option) and CMD buttons before pressing the power button and keep holding the 4 buttons till you hear the second 'bong'. This will flush any stored passwords in the NVRAM/PRAM.

Hope this helps somebody out as much as it helped me.

[dirigjenti29]

Hi,please need bios bin A1502 emc2678 820-3476-A

[peste]

Originally Posted by dirigjenti29

Hi,please need bios bin A1502 emc2678 820-3476-A

Post the bios backup

[peste]

Originally Posted by dirigjenti29

hi,please need good bios A1502 emc 2678 820-3476-A,thank you

try this bios, it is the bios from post# 6, if it is not ok, post the copy of your bios here, I wrote you in the post above.

[magneh]

Hey all.

Got this 820-3476-a that came to me with late display.
Chimes, but image only appears almost at the end of the bar loading of OSX.

I see flux on the SMC and bios ICs.

Would it be bios issue and needs clean me region?

Heres the bios dump.

Thanks for any help on this!

[peste]

try..

[magneh]

Originally Posted by peste

try..

Hi Peste!
Thank you.

No , back light still only turns on near the end of the OSX loading bar...exactly the same thing.

Could it be that someone applied a 820-3476-A model SMC no?

Or this is only BIOS related?

Thanks!

[magneh]

I meant an SMC of a 3476-a board but from another year maybe?

[piernov]

What matters is the board model number. If the SMC comes from another 820-3476 board it's good. If it comes from another model you can have all sort of weird problems.
In this case 820-3536 is compatible too.

[magneh]

Originally Posted by piernov

What matters is the board model number. If the SMC comes from another 820-3476 board it's good. If it comes from another model you can have all sort of weird problems.
In this case 820-3536 is compatible too.

Hi Piernov!
Thanks for the input. Well noted, nice to know that.

Sou in this case for a late display, thats only bios related for sure?
Have tried with the previous dump but issue persists.

Any idea?
Thanks!

[sars2004]

hi
please remove password from my bios backup file

[peste]

Originally Posted by sars2004

hi
please remove password from my bios backup file

post the bios