Macbook Pro 13 A1502 (820-3536-A)

[AlexNTI]

Hello,
need bios dump Macbook Pro 13 A1502 (820-3536-A)
Thanks

 

[2informaticos]

Try this, as is.

3536 clean ME fixed ssn.rar

drive.google.com

3476 BIOS works too; already posted on the forum.

 

[AlexNTI]

Hi,
This is my problem all files of this bios i cant load. "File open error" why?
I also downloaded it from vinafix. Same error. In both programmers.
I do not understand something? Of course, all other things work properly.
Please help me.

 

[2informaticos]

I don't have RT809 programmer, I can't help too much.
A BIOS programmer should open any file, no matters its extension.
However, extract the rar/zip first; you need the bin/rom file.

BTW, don't waste more time with vinafix BIOSes; more than 90% garbage there...

 

[piernov]

Remove any special character from directory and file names.

 

[AlexNTI]

Yes, I know that.
There's some other problem here that I do not understand yet.
Even though I try to read Bios from any model 820-3536-A of this one he does not let me keep it and gives a mistake.
I have never met such a thing, and I have been working since 2005.
I can not upload the file and I can also not save the file I read.
I tried with 3 different programmers.
It only happens with 820-3536-A.
Another question may be a BIOS of 820-3476-A can fit or not?

 

[AlexNTI]

By the way, it's an error that calls me that I'm trying to save the BIOS I read

 

[2informaticos]

May be software problem, try the programmer with other computer.

820-3437 BIOS works good on this board.

 

[AlexNTI]

820-3437 This is a MacBook air, are you sure this works?

 

[2informaticos]

I meant 3476; sorry for mistake.

 

[Jeffotskie26]

Try this, as is.

3536 clean ME fixed ssn.rar

drive.google.com

3476 BIOS works too; already posted on the forum.

hi @2informaticos i just used this file it works for me my question is..
do i still need to edit the serial number or i can just direct use this file. thanks!

 

[2informaticos]

Should be good to use original serial number.
Remember, you MUST fix Fsys checksum, if change it.
If you have BIOS backup of your board, then just "transplant" its Fsys area...

 

[Jeffotskie26]

Can u help me @2informaticos fix fsys checksum. still dont know this such things -TIA
ORIG FILE

 

[2informaticos]

Do you have the backup of your BIOS?

 

[Jeffotskie26]

YES

Can u help me @2informaticos fix fsys checksum. still dont know this such things -TIA
ORIG FILE

yes! this is the original file attach

 

[2informaticos]

Sorry, didn't realize there is a link.
I'm still with first coffee of the day; didn't fully open eyes yet.

Replace corresponding part of actual BIOS; starting with Fsys, until $SVS.
No need to fix Fsys checksum then.

Fsys area.bin

drive.google.com

 

[Jeffotskie26]

no worries @2informaticos.
***Replace corresponding part of actual BIOS?
did u mean do i still need to edit something using hex editor???
or i can just use directly the edited file?

 

[2informaticos]

Open in HxD and replace the mentioned part in new BIOS.
BTW, do copy/paste in the hex area, not in decoded text.
I uploaded only the Fsys area extracted from your backup...

 

[Jeffotskie26]

Open in HxD **backup... starting with Fsys, until $SVS. ..

I followed this but same thing issue happened after can hear the startup sound it shuts off fan stop spinning.
@2informaticos can u help me upload the edited file that no need to edit from hex?

 

[2informaticos]

Looks like you've delimited correctly Fsys area into BIOS.
Once replaced, save the file and flash U6100.

If doesn't work, original Fsys area may be damaged.
Then change serial number and fix Fsys checksum by software; if you don't have Medusa programmer.
Video available on the forum...

How can I turn a bios file into a readable format?

I extracted the bios from an 820-3115 MBP using a CH341a programmer. Is there a program that can get this into a readable format so I can see basic information about the computer (ex. serial number)? Thanks

boards.rossmanngroup.com