Re: M1 A2337 Not able to access Recovery or DFU mode
Since I was not sure if there was still any important data on the machine I Just did the "Revive"
Once the progress finished the mac would boot directedly to the Activation step.
Stayed that way for a month when I finally got back from the previous owner and we did the process to remove from his iCloud....
rodgsilva
Member
Last Activity: 06-15-2023, 06:03 PM
Joined: 01-21-2023
Location: SÃO PAULO
-
Re: M1 A2337 Not able to access Recovery or DFU mode
Well I wish I could help but I'm a total beginner and I just followed the steps from the wiki, and worked fine. I don't remember if I tried with the board lose or if was already in the enclosure with all the IO, but the battery was not connected for sure.
----------->
I also just coming back to report that I found a donor in perfect condition but with activation lock, so I pulled the missing parts from...
Had to run some wires to repair broken traces and missing pads,...Leave a comment:
-
MBA A2337 820_02016 board working but missing components (beginner question)
Hello, I have this M1 A2337 board here that I already did a post on:
([url]https://www.badcaps.net/forum/showthread.php?t=116553[/url])
After I was able to force DFU and did a restore with Apple Configurator2, only today I got back from the previous owner who did the process to remove activation lock remotely, so I was finally able to activate and reinstall the OS.
I put in another chassis and seems to be working fine (apart from the original issue with not being able...Leave a comment:
-
Re: MBP A1502 820_3476A S0 Enable issues (total beginner)
Just checked and I have 153ohms from L7630to ground, so pretty close to your reference....Leave a comment:
-
Re: MBP A1502 820_3476A S0 Enable issues (total beginner)
I'll check the resistance later today and report back.
I got confess I'm a little afraid with the idea of removing the BIOS from the good board and end up with two bricked A1502 haha So I guess I'll try to find another donor first.
I already got the USB-C power meter to deal with newer models but I did not know i could use with an adapter to check current on the magsafe, I'll try to find thanks for the info.
I don't have a proper microscope but my setup its pretty good for close inspection,...Leave a comment:
-
Re: MBP A1502 820_3476A S0 Enable issues (total beginner)
Ah got it, thanks for the clarification.
I just checked the switches and they seem to be fine.
I was able to get a working board of the exact same model so now It makes a lot easier since I take references. With that said I guess I found at least part of the problem...
SPI U6100 (Bios)
On the good board I have:
Pin 2 - SPI_MLB_MISO = activity from 0 to 3.3v
Pin 5 - SPI_MLB_CLK = from 0 to 20v (maybe 0.40v)
Pin 6 - SPI_MLB_MOSI = from 0 to 20v...Leave a comment:
-
Re: MBP A1502 820_3476A S0 Enable issues (total beginner)
Hi thanks for the input.
Yes I do have fan spin and Vcore voltages.
L7630 = 1.05v
L7310 = 1.7v
So if the enables are correct than I'm not sure what I could check next...
The only "glass like 8 pin ball chip" I could find was u2940
And I have the following...
Pins 1 2 3 4 5 and 6 = 0.9v
Pin 8 = 3.3v...Last edited by rodgsilva; 03-23-2023, 10:04 AM.Leave a comment:
-
MBP A1502 820_3476A S0 Enable issues (total beginner)
Hello, just a quick disclaimer... I'm a total beginner at logic board repair, just got my hot air station few weeks ago, so forgive if I'm missing something really obvious here.
I have a A1502 board here (820_3476A) that show green than orange light on the charger and fan spin, but no chime or image. (tried all the key combos resets)
No sign of liquid damage, only some minor corrosion on a couple of 201 resistors the I already replaced.
Seems like all the main power rails are present but there're issues with the S0 1.05v enables.
[ATTACH]294017[/ATTACH]... -
Re: M1 A2337 Not able to access Recovery or DFU mode
I was able to find more info about forcing DFU.
Not sure if I can share links here's so I'll just reference from Logi.Wiki
"100% direct DFU mode using jumper
* locate FORCE_DFU jumper. on some Macbook Air boards there is just a testpoint which needs a wire to connect it with 1.8V. This signal needs to be pulled up to 1.8v to activate FORCE_DFU
* power-reset the device (unplug the battery, plug it back).
* Pull FORCE_DFU to 1.8v line
connect DFU cable to the device. It will...Leave a comment:
-
M1 A2337 Not able to access Recovery or DFU mode
Hello everyone,
I have this machine here that was bought as "scrap for parts" badly damaged and ripped display.
The machine gets 20v, chime and can boot to the login screen when attached to an external monitor. however even with the password and yes I have access to the original owner says "Your Account is locked".
The issue is that I can't access Recovery or DFU mode, the power button work for turn the machine ON so I guess it's not faulty.
After some further investigation I found that there is damage some damage on the logic... -
Re: New Members - please post your introductions here
Hello! I'm Rodrigo from Brazil.
Repair enthusiast that just invested in a simple hot air/iron station and I''m looking forward to learn about board repair.
Found the forum when searching for a schematic/board view
and I would like to say thanks for all the members taking time to provide such information.Leave a comment:
No activity results to display
Leave a comment: