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soldering pads on a1502 emc2835
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- reverendalc
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7 years 9 months ago #3942 by reverendalc
soldering pads on a1502 emc2835 was created by reverendalc
so i've got this a1502 emc2835 macbook pro retina, and it's iCloud locked, but has a non 4digit EFI pin. my brute force failed.
i've got the board out, and have located contacts for everything but VCC, and that resistor is so damned close i'm uncomfortable soldering to the leg.
has anybody gotten down on this model like so? if so, what's the way to handle that?
or should i just get out my hot air station and pull the chip? i've never done that before (with the intention of reinstalling the chip).
i've got the board out, and have located contacts for everything but VCC, and that resistor is so damned close i'm uncomfortable soldering to the leg.
has anybody gotten down on this model like so? if so, what's the way to handle that?
or should i just get out my hot air station and pull the chip? i've never done that before (with the intention of reinstalling the chip).
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7 years 8 months ago #4087 by Gr-oborona
Replied by Gr-oborona on topic soldering pads on a1502 emc2835
A couple of days I'll try to unlock the same exact MacBook
My friend said that tried to read dump from the chip removed from the board but dump size is 8.5 megabytes, and he was not able to read it with the help of his programmer
When I got this MacBook I will describe the issue in detail
My friend said that tried to read dump from the chip removed from the board but dump size is 8.5 megabytes, and he was not able to read it with the help of his programmer
When I got this MacBook I will describe the issue in detail
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7 years 8 months ago #4088 by reverendalc
Replied by reverendalc on topic soldering pads on a1502 emc2835
I manage to get my hands on a 2015+ interface, but was never able to communicate with the chip myself.
I checked the data sheet for the mx25l6437e and the connections were right, but flashrom wouldn't recognize it.
I checked the data sheet for the mx25l6437e and the connections were right, but flashrom wouldn't recognize it.
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7 years 8 months ago #4094 by Gr-oborona
Replied by Gr-oborona on topic soldering pads on a1502 emc2835
I took apart my MacBook and it has winbond chip
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7 years 8 months ago #4095 by reverendalc
Replied by reverendalc on topic soldering pads on a1502 emc2835
interesting. i've already unlocked and parted ways with that macbook, but it definitely had a macronix chip.
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7 years 8 months ago #4109 by Gr-oborona
Replied by Gr-oborona on topic soldering pads on a1502 emc2835
I removed winbond chip from motherboard
I read the dump.
Removed place with a password.
Recorded dump to mx25l6406e (not winbond, to try if they a replaceble)
I set mx25l6406e chip on the motherboard
Turned MacBook ON and hit command + R
He no longer asks Efi password and I thought that everything turned out, but...
MacBook connected to WiFi and started internet recovery, downloaded it
and after all this, he asks me to enter a 4-digit PIN
All previous Macbook's downloads OS X but this one asks PIN, and now I do not know what to do?
I read the dump.
Removed place with a password.
Recorded dump to mx25l6406e (not winbond, to try if they a replaceble)
I set mx25l6406e chip on the motherboard
Turned MacBook ON and hit command + R
He no longer asks Efi password and I thought that everything turned out, but...
MacBook connected to WiFi and started internet recovery, downloaded it
and after all this, he asks me to enter a 4-digit PIN
All previous Macbook's downloads OS X but this one asks PIN, and now I do not know what to do?
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7 years 8 months ago - 7 years 8 months ago #4110 by reverendalc
Replied by reverendalc on topic soldering pads on a1502 emc2835
removing password from EFI doesn't remove iCloud lock from EFI.
simply reset the NVRAM by booting with CMD/OPT/P/R (which you couldn't do before due to EFI password)
then you're all set!
so you pulled a winbond chip from your a1502, and installed an MX25L6406E?
that's awesome. my a1502 emc2835 had an MX25L6473E
isn't the 6406E taller with exposed legs, and the winbond/6473E surface mount?
simply reset the NVRAM by booting with CMD/OPT/P/R (which you couldn't do before due to EFI password)
then you're all set!
so you pulled a winbond chip from your a1502, and installed an MX25L6406E?
that's awesome. my a1502 emc2835 had an MX25L6473E
isn't the 6406E taller with exposed legs, and the winbond/6473E surface mount?
Last edit: 7 years 8 months ago by reverendalc.
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7 years 8 months ago - 7 years 8 months ago #4121 by Gr-oborona
Replied by Gr-oborona on topic soldering pads on a1502 emc2835
Absolutely right winbond I removed and installed instead MX25L6406E
Winbond w25q64fviq is smaller and I soldered it on wires to try.
Winbond w25q64fviq is smaller and I soldered it on wires to try.
Last edit: 7 years 8 months ago by Gr-oborona.
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7 years 8 months ago #4148 by Gr-oborona
Replied by Gr-oborona on topic soldering pads on a1502 emc2835
I have done as you have written, and has already installed the latest OS X
thanks for the help
thanks for the help
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7 years 8 months ago #4149 by Gr-oborona
Replied by Gr-oborona on topic soldering pads on a1502 emc2835
About ^isn't the 6406E taller with exposed legs, and the winbond/6473E surface mount?
You are right but the wires help to fix it, I have installed chip with legs just to check the result
Later I wrote a dump on nativ Winbond chip and installed it on the motherboard
You are right but the wires help to fix it, I have installed chip with legs just to check the result
Later I wrote a dump on nativ Winbond chip and installed it on the motherboard
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7 years 8 months ago #4154 by k-pax
Replied by k-pax on topic soldering pads on a1502 emc2835
hi,i have this mac 820-4924-a a1502(2015)and no communication with the programmer
what do your think?
thanks in advance!!
what do your think?
thanks in advance!!
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7 years 8 months ago #4155 by CygnusX1
What programmer are you using?
If I helped you buy me a latte!
Replied by CygnusX1 on topic soldering pads on a1502 emc2835
k-pax wrote: hi,i have this mac 820-4924-a a1502(2015)and no communication with the programmer
what do your think?
thanks in advance!!
What programmer are you using?
If I helped you buy me a latte!
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- reverendalc
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7 years 8 months ago #4156 by reverendalc
I'm glad I could help you get it going.
I love your inquisitive mind! I find myself doing all sorts of stupid sh*t just to see if it works (-:
@kpax:
Do you have the chip removed from the a1502?
Replied by reverendalc on topic soldering pads on a1502 emc2835
Gr-oborona wrote: I have done as you have written, and has already installed the latest OS X
thanks for the help
I'm glad I could help you get it going.
I love your inquisitive mind! I find myself doing all sorts of stupid sh*t just to see if it works (-:
@kpax:
Do you have the chip removed from the a1502?
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7 years 8 months ago #4158 by k-pax
Replied by k-pax on topic soldering pads on a1502 emc2835
yes,remove bios,programming and perfect.
I have rt809f
I have rt809f
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- reverendalc
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7 years 8 months ago #4159 by reverendalc
Replied by reverendalc on topic soldering pads on a1502 emc2835
Programming and perfect? I'm confused.
Which chip does your a1502 have?
Macronix?
Which chip does your a1502 have?
Macronix?
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7 years 8 months ago #4160 by k-pax
Replied by k-pax on topic soldering pads on a1502 emc2835
winbond w25q64fv,do not communication programming/bios
and remove chip bios,programming and ready.
this mac 2015 this is crazy,i not have conector for pass remove
and remove chip bios,programming and ready.
this mac 2015 this is crazy,i not have conector for pass remove
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- reverendalc
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7 years 8 months ago #4167 by reverendalc
Replied by reverendalc on topic soldering pads on a1502 emc2835
your english confuses me. have you successfully done it?
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7 years 1 month ago #6585 by k-pax
Replied by k-pax on topic soldering pads on a1502 emc2835
HI guys,only this machine never I can programing in circuit
I don't know what happen
I used rt809f,ch341a and nothing
somebody help me,please
I don't know what happen
I used rt809f,ch341a and nothing
somebody help me,please
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7 years 1 month ago #6626 by sinonhim
Replied by sinonhim on topic soldering pads on a1502 emc2835
How confident are you that clearing PRAM will clear the iCloud lock? I'm about 4000 in on a brute force and don't really wanna start again.
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7 years 1 month ago #6650 by sinonhim
Replied by sinonhim on topic soldering pads on a1502 emc2835
loooooooooool it worked no problems haha thanks. Saved myself a heap of time
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