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macbook air 2015 board 820-00165 problem with loading osx after efi reprogramed

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speedyaction

New member
Hi. I have problem with macbook air 2015 board 820-00165. I got it from customer who looks like to try fix this laptop himself. There was lots of flux on efi chipset. What ever. I got clean bin file for a1466 emc 2925 and added serial number from the bottom of macbook. After reprogram chip and solder to main board reset pram and smc laptop is loading to half bar and is stop. I change for another fully working ssd but is still this same problem. Anybody can help with this?
 
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aprendiz

Moderator
ME region problem!!!, you can't replace EFI chip like that, it is not even the same model!!!..... Why did you replace bios in the first place?? What makes you think bios is the problem??
 
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speedyaction

New member
Hi. Thank you for replay. I never wanted to touch efi chipset but i seen efi chip was removed and solder very bad way. When i got this laptop i press power button the fan spin for 3 second then stop. So i reprogram bios and now is powering up but loading bar going to half way and stop. Not moving at all now. Not sure what to do now.
 
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dukefawks

Administrator
Well if you do not have the original backup you are fucked. I have no clean ME for these boards, maybe someone else here? Post a link to your ROM file here too.
 
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speedyaction

New member
I dont have original backup because someone b4 me try to fix himself and done to much mess with bios file so i has to clear efi and reprogram it again. my friend send me bios file with clean serial number but is no working.
 
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dukefawks

Administrator
I understand that. Any BIOS that you program must have a clean ME region for it to work. I have no file with a clean ME for these boards at this time. Your problem is the "ME region". Instructions on how to make a clean ME region can be found with Google.
 
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speedyaction

New member
so if i will have this same board from 2015 820-00165 and read bios file and copy to my efi chip will that works?
 
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speedyaction

New member
ok. thats mean a lot. so is there any way to get original dump? its last question.i dont want to waist your time any more m8 :) thx for all information you provide. glad i know what isa all about now. i may keep it for parts
 
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