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Apple MacBook Pro A1502 (820-3476-A)
serial c02p228mg3qt
efi password ples remove...

Please, I need help with Bios efi unlock for macbook pro a1502 emc 2678.
Serial no.: C02m21rafh04

Hello,

i have here a Macbook Pro with Password,
Model : A1502 EMC 2678
board number : 820-3476-A
Serial number : C02LXKQNFH00

Any help Please!...

OBDATA Raccoon Computer V1 for Macbook Pro Air 2012-2025

It's the end of three years of work, it costs money, it costs time, and you owe me a beer.

This is the new database for FlexBV
it's optimized to work with it
by using board ID has Default name, give us the opportunity,
to use other diode board data with sibling board or family board
I Merged the whole data (optimal)


A2991 A2992 M3 -> -> 2 Entries diode data M1
A2681 A3113 A3114 M1 M2 Air -> -> 2 Entries diode data M1 M2 13"
A2442 A2485 A2779...

Need clean bios for EFI unlock cannot find it on the forum after search. Link me to the thread if there is one thanks! If not a bios dump with clean EFI. Thanks guys!

Hello everyone.
My Mac A1502, when I tried to remove the EFI, only turned on the fan, and flashing the original did the same. I thought I had damaged the BIOS memory, so I replaced it, but it's still the same; the BIOS is corrupted.
I edited and flash one of the ones in the thread, and turns on, appears almost at the end of the bar loading of OSX, but it won't let me install the system.
I need help.

Specs
MacBook Pro A1502 (820-3476-A)
EMC 2875
Serial C02N6HSTG3QH...

hello
I have here an A1502 Macbook Pro Late 2013 820 3584a 13 inch. It has water damage and starts, but the fans turn up very quickly.
Now I wanted to see what and possibly which sensor is defective.

Does anyone have Schematics and Boardview for me? I haven't found it yet because it's a German device?
That would be very nice, thank you.

**[HELP] MacBook Pro A1502 - 820-3476-A - BIOS Corrupt - Need Clean Dump**
Hello everyone,

My MacBook Pro A1502 (EMC 2875) won’t boot anymore after I attempted to remove the EFI lock and accidentally corrupted the BIOS.

🔧 Specs:
- Model: MacBook Pro Retina A1502
- Logic Board: 820-3476-A
- Serial Number: C02N655DG3QH
- EMC: 2875

I’m looking for:
- A **clean BIOS dump** for this board
- Preferably with **EFI/iCloud lock removed**
- And guidance on how to **flash it using...

Apple MacBook Pro A1502 (820-3476-A)

Macbook pro A1502
Main-Board : 820-3476-A
Serial n° : C02N655DG3QH
EMC2875

can anyone could help me. my macbook doesn't boot anymore my bios files got corrupted after i tried to remove the efi lock

I need the file and someone to guide me to flash it

Good day to all,

Can anyone who has a good dump for this model? Macbook Pro A1502 emc 2678 has no display board model 820-3536-A, i attach the dump.

TIA....

Macbook pro A1502 With no display, need clean me plizz
board/no: 820-3476-A.
S/N: C02M4JB9FH00
ME865N...

Hi, i need clean bios bin file
MacBook Pro Ratina 13.3" - Early 2015
Model #: A1502 EMC 2875
Sales Number: MGX72LL/A

Hi, i need clean bios bin file
MacBook Pro Ratina 13.3" - Early 2014
Model #: A1502 EMC 2875
Sales Number:c02p20yug3qr
backup copy of the original​...

Hello. Have this Apple Mac pro 13" A1502 820- 3476-A that show no power, no green light on charger. i m in need of schematic and boardview

or can somebody download this schema and boardview? it looks similiar but i dont have enough points to download
https://www.elvikom.pl/schemat-apple...36-t33066.html

Hi everyone, I want to share my tech experience with a MacBook Pro A1502 late 2013 that won´t turn on.
The computer arrived dead, when connected to Magsafe no lights on the connector.
Here some Measures at some testpoints on de LB 820-3476-A :

PP3V42_G3H 1.7V
PPBUS_G3H = 0V
PPVBAT_G3H_CHGR_RE = 0V
PP3V3_S5 = 0V
PP5V_S4 = 0V
P5V1_SW = 5.5V
PP3V3_S0SW_SSD =0V
PP3V3_S0SW_SSD_FET =0V
PPDCIN_G3H_INRUSH = 16.10V
PPDCIN_G3H_CHGR = 16.10V
PP5V_S5 - 0v
PP3V3_S5 - 0v
PP3V3_SUS - 0V
PM_RSMRST_L - 0v...

Hi guys trying to help a customer thats trying to revive an old Macbook its got a defunkt Icloud on theres so I read the Rom and cleared $svs region out and replaced with FF but now only a black screen, completely wierd?. I have attached the original dump and the dump I cleared, can anyone assit please, now occasional chime and black screen, have tried another bios chip of a donor and it work but obviously wrong serial and bad me region made it super slow,

Any help appreciated...

Hi guys,
I have a macbook A1502 that does not charge if the battery is completely discharged!!
If I unplug it and reconnect it to the motherboard it starts to charge well, and it charges up to 100% and works.
If I let the battery completely discharge, and connect the charger, the magsafe2 LED turns orange but it never charges the battery.
What do you recommend I try?
I tried to change the battery with a new one and the problem did not solve it​
Code mainboard 820-3476-A

Data Analysis & Test Point Isolation – MacBook A1502 (820-3476-A) Battery Won't Charge After Full Discharge


This guide will use data-driven testing and precise test point measurements to isolate the root cause of the issue.

---

Problem Breakdown & Failure Mode Analysis
...

MacBook A1502 (820-3476-A) Battery & Charging Issue

• PM_BATLOW_L = 3.34V with charger, no battery → Normal behavior (since it's pulled up to 3.42V).
• PPBUS_G3H is too low (~10-11V with charger, 12.65V without battery) → Charging circuit issue.
• Battery does not charge when completely discharged.

---

Step-by-Step Deep Diagnosis

Step 1: Check Charger & Adapter Sense Circuit (ADAPTER_SENSE)

• You measured ADAPTER_SENSE = 2.8V.
• Normal range should be around 3.3V.
• If ADAPTER_SENSE is too low, the MacBook might be misreading the charger wattage → throttling charging power.

What...

Advanced Troubleshooting for PPBUS_G3H Voltage Drop on MacBook A1502 (820-3476-A)


Since you're getting only 10.11V on PPBUS_G3H with the battery connected, but a normal 12.65V with the battery disconnected.

---

Step 1: Identify the Main Issue
...

Hello again,

got an MacBook Pro from 2015, model A1502 and motherboard version 820-3476-A.

Device died over night on charger.

Currently I did the follow things:

1. Checked visuell the board, test with another MagSafe-Charger and with another DC-IN-board too
2. Measured 16,5V on ​PP18V5_DCIN_FUSE but 0V on ADAPTER_SENSE and 0V on PP_3V42_G3H and 0V on PPBUS_G3H but 16,5V goes to U7090
3. Because of corrosion and bad resistor values I changed these components: U7090 / C7094 / C7095 / R7095 / R7096 / L7095 / C7099 -> But further...

Heloo

Friends
Apple MacBook Pro A1502 (820-3476-A)

efi password please remove...

thank you for the explanation but the macbook is an A1502 and does not have usb-c...

Please help me, my macbook pro a1502 has a bios i think its corrupt cause of 1kb extra there was. please fix its...

I imagine most of this site's audience isn't exactly the "Mac crowd". Personally, I do have a MacBook Pro (a circa-2015 A1502 model running macOS 11.7.10 "Big Sur"), mainly because it "plays nice" with my fire-wire DV/HDV camcorders better than most modern PCs, but it is far from my primary system....