A1418 EMC 2638 NEED HELP CLEAN EFI


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1 year 1 month ago #10394 by A-ndong
HI EVERYONE
I need help with my locked bin,any help really appreciate
Thank you
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1 year 1 month ago #10396 by GhostJas
can you upload untouched bios again, looks like this one had been modified and missing some fields.

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1 year 1 month ago - 1 year 1 month ago #10397 by A-ndong
Hi GhostJas,my customer brought this imac into my shop,I tried to load new os by option key,and it asked for 4 digits key,so i read the dump file and posted it here,so this is the only file i have,and as customer told me that he had brought this imac to the other shop before,so it could be has a corrupted bios file.
Thank you
Last edit: 1 year 1 month ago by A-ndong.

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1 year 1 month ago #10398 by GhostJas
well, can you have a look the serial number on the bottom of the imac stand, I can modify the new BIOS to match it. also I have checked your bios dump, it must be not the original one, the BIOS serial number did not belong to this BIOS dump. serial - XXXXXXXF8J2 , but this BIOS dump was from XXXXXXXF8J7. tell me your imac serial I will get you a working BIOS dump.
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1 year 1 month ago #10399 by A-ndong
GhostJas
The ssn is C02M94L9F8J2,this ssn from the bottom of the imac’s stand,can you make a working bios match this ssn?if you could it would be greatfull
Thank you for your help

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1 year 1 month ago #10400 by GhostJas
here you go.
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The following user(s) said Thank You: A-ndong

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1 year 1 month ago - 1 year 1 month ago #10401 by A-ndong
I will try and keep you updated,thanks for your working hard to help me out,really appreciate it.
Thank you
Last edit: 1 year 1 month ago by A-ndong.

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1 year 1 month ago #10402 by A-ndong
I tried three times but this file is not working,but still thanks a lot for your help.This file make the inac black out and no chime.
Thank you

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1 year 1 month ago #10403 by GhostJas
first of all, you need to ERASE old bios, then rewrite the new BIOS dump. just simple overwrite new BIOS dump wont work.
then after write the bios, reset smc and pram after iMac boots, your imac will chime as usual. press option key, will show you the boot disk.

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1 year 1 month ago - 1 year 1 month ago #10449 by moiky
Hello, I need Help, I make a dump for my MXIC 25L6406E this is iMac A1418 EMC 2638

, I need a dump clean, you can help me? please
I make 4 dumps identical, this iMac is blocked for password EFI


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File Name: iMacA1418EMC2638.zip
File Size:4,160 KB
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Last edit: 1 year 1 month ago by moiky.

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1 year 1 month ago #10452 by GhostJas
here you go. UNLOCKED EFI PASS
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