MacBook 12 A1534 EMC 2991


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7 years 2 months ago #6107 by k-pax
Replied by k-pax on topic MacBook 12 A1534 EMC 2991
hi,this working..
I have ch341a,read ok,but not removed the password

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7 years 2 months ago #6108 by perarg
Replied by perarg on topic MacBook 12 A1534 EMC 2991
Hi, how do you have connected the ch341a to the macbook ?

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7 years 2 months ago #6109 by reverendalc
Kpax are you unable to write your cleaned rom back?

I believe the problem is related to WREN not being set

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7 years 2 months ago #6116 by k-pax
Replied by k-pax on topic MacBook 12 A1534 EMC 2991
HI anybody,removed the password in this a1534 (2015)?

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7 years 2 months ago #6157 by reverendalc
Kpax, please provide more information so we can help you.
The following user(s) said Thank You: k-pax

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7 years 2 months ago #6164 by k-pax
Replied by k-pax on topic MacBook 12 A1534 EMC 2991
HI,i conection with wires ch341a/logic board a1534.
the machine have password,the ch341a show verification ok.
but the machine safe password,no erase?

anybody help please

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7 years 2 months ago #6170 by reverendalc
i'm sorry, but you're not being very clear on what you're trying to do and how it's not working

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7 years 2 months ago - 7 years 2 months ago #6205 by k-pax
Replied by k-pax on topic MacBook 12 A1534 EMC 2991
hi guys,ChomsMaster you video of you tube machine a1534 show programming "in circuit",
but in the specification tell :
SOLUCIÓN
Desmontar el ordenador, ""retirar la BIOS"", editar el binario y reprogramar el chip.

please tell me? you desolder of bios? or not
Last edit: 7 years 2 months ago by k-pax.

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7 years 2 months ago #6213 by ChomsMaster

k-pax wrote: hi guys,ChomsMaster you video of you tube machine a1534 show programming "in circuit",
but in the specification tell :
SOLUCIÓN
Desmontar el ordenador, ""retirar la BIOS"", editar el binario y reprogramar el chip.

please tell me? you desolder of bios? or not


You can disassemble it if you have to read it, otherwise you have to solder each wire to the connectors of the bios and it is very delicate since you have to know which ones are exactly, my recommendation is that you do it without disassembling the bios, soldering as it is Explains earlier,

regards

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7 years 2 months ago #6214 by perarg
Replied by perarg on topic MacBook 12 A1534 EMC 2991
ChomsMaster, my friend, I tried many times to connect wires or needles to the components. This board is small and components are tinyyyyyy. It seems impossible to make connections...

ChomsMaster I don't know how you're doing this but you are my hero!!

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7 years 2 months ago #6216 by k-pax
Replied by k-pax on topic MacBook 12 A1534 EMC 2991
hola,he revisado otra vez las conecciones en mi a1534.y todas estavan bien
menos el pin 8 del bios que lo puse en el pin 2(PP3V3_G3H) del conector u6100

quizas desde ese punto, no le llega bien el voltage al bios

que creen?

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7 years 2 months ago #6217 by perarg
Replied by perarg on topic MacBook 12 A1534 EMC 2991
Please guys, speak only in English... You are not alone here nor private conversation

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7 years 2 months ago #6218 by ChomsMaster

perarg wrote: ChomsMaster, my friend, I tried many times to connect wires or needles to the components. This board is small and components are tinyyyyyy. It seems impossible to make connections...

ChomsMaster I don't know how you're doing this but you are my hero!!


Hehehe you have to use microscope or magnifying magnifying njen to be able to weld each key well

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7 years 2 months ago #6219 by ChomsMaster

k-pax wrote: hola,he revisado otra vez las conecciones en mi a1534.y todas estavan bien
menos el pin 8 del bios que lo puse en el pin 2(PP3V3_G3H) del conector u6100

quizas desde ese punto, no le llega bien el voltage al bios

que creen?


What I personally think is that you do not read enough, I have already explained in detail where they should go and I do not intend to do it again.

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7 years 1 week ago #6693 by yolito
Replied by yolito on topic MacBook 12 A1534 EMC 2991
hi,perarg you can remove password this machine?

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7 years 2 days ago #6722 by perarg
Replied by perarg on topic MacBook 12 A1534 EMC 2991
Sorry for the delay @yolito, no i couldn't remove the password using the described way. There are tiny components and you should use microscope for sure. You should be extremely cautious because it may brick your motherboard...

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6 years 6 months ago #8200 by InDustWeTrust
hello

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6 years 6 months ago #8201 by InDustWeTrust
I have a problem, model emc 2991, core m5 1.2ghz

I can read the chip, I edited the code, then when reprogramming the chip, it also works, but in verification it gives an error though... It's strange, because I also tried to program back the original code, and that gives no error, so i must be doing something wrong editing it. Which is weird, size was exactly the same and i edited the code just as i always did with other macs... please help!! If someone has a dump for this would be great. I can also send the original locked dump i have, in case anyone can help or edit it, thanks!!!

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6 years 5 months ago - 6 years 5 months ago #8483 by yolito
Replied by yolito on topic MacBook 12 A1534 EMC 2991
hi InDustWeTrust,what programmer you have,and "easyflash"?
thanks in advance
Last edit: 6 years 5 months ago by yolito.

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6 years 5 months ago #8597 by faridmax
Replied by faridmax on topic MacBook 12 A1534 EMC 2991
i have read the chip Winbond W25Q64FV [TFBGA24] successfully but in Binary file can't find $SVS to clean it :blink:
Attachments:

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