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gbuniva started a topic MacBook A1502 (820-3476-A) Repair case with solution

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-09-2025, 07:11 PM
MacBook A1502 (820-3476-A) Repair case with solution

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...

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gbuniva replied to New Members - please post your introductions here

in Announcements & Related News

05-07-2024, 08:33 PM
Hi guys Gustavo here from Argentina. I have my own business
I'm an electronic engineer, hope Ican help

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gbuniva replied to Need Lenovo IdeaPad 3 14ITL05 board NM-D461 Dump

in BIOS Requests ONLY!

05-07-2024, 07:15 AM
Thank you [B][URL="https://www.badcaps.net/member/257580-qayyum786"]qayyum786[/URL][/B]. I tried your bin files and same issue, I´m trying to get a replacement for the I/O controller. Thank you!Thank you [B][URL="https://www.badcaps.net/member/257580-qayyum786"]qayyum786[/URL][/B]. I tried your bin files and same issue, I´m trying to get a replacement for the I/O controller. Thank you!Thank you [B][URL="https://www.badcaps.net/member/257580-qayyum786"]qayyum786[/URL][/B]. I tried your bin files and same issue, I´m trying to get a replacement for the I/O controller.

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gbuniva replied to Need Lenovo IdeaPad 3 14ITL05 board NM-D461 Dump

in BIOS Requests ONLY!

05-06-2024, 08:14 PM
Hi, I need some help with a Lenovo Laptop.

Lenovo Ideapad 3 14ITL05
S/N: PF4372D0
MTM: 81X700FGUS
Factory ID: JVHFC1
MO: PF9XB2B24003
HS45A/HS55A NM-D461 Rev: 1.0

It's turning on and everything okay but when you press any key on the keyboard, it sends the signal twice, i mean when you press the key it sends the letter and then when you release the key it sends the same letter again, i.e in the Notepad app when you press and release "a" key you get "aa" in the app.
This issue happens in every app, even in the BIOS...

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gbuniva replied to New Members - please post your introductions here

in Announcements & Related News

04-24-2024, 09:25 PM
Hello, im Gustavo from Argentina.
I use to search technical information here in Badcaps, and I hope I can help with my experience.
Thank You

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gbuniva replied to Dead 2018 Macbook Pro A1990 820-01041-07 stuck at 5V 0A

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-21-2024, 09:07 AM
Hi mon2, thank you for your assistance:

L6960 = 3.42V constant
L6961 = 2.4 - 2.8 v fluctuating all time

R6934 = 0 ohm
R6935 = 0 ohm

P5VG3S_VSW rail in resistante mode gets 350ohm and infinity like a diode

Now something strange just happened, when a was about to measure [B]P5VG3S_EN_R [/B]= pin # 4 with the battery connected, the Mac turned on (never did before)... now I have it running and charging the battery from 0%.... I´ll keep it ON and charging until 100% to see what happens and report you back.
ThanksHi mon2, thank you

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gbuniva replied to Dead 2018 Macbook Pro A1990 820-01041-07 stuck at 5V 0A

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-20-2024, 08:53 AM
Sorry I posted my concern here because was the only way.
I have a 820-01041-A that works only when battery is disconnected.
No signs of liquid damage, board looks good.
The only way that turns on and boots normally into the system is w/o battery and conecting the USB C power cable to the bottom left side connector.
Otherway doesn´t turn on.

Measures connected to Magsafe and w/ battery :

PPBUS_G3H = 12.50v
PP3V3_G3H_T = 3.35v
P5VG3S_VSW = 0v
CHGR_BGATE = 12.43v

PP1V2_AWAKE = 1.21v
PP1V8_AWAKE = 1.81v...

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gbuniva replied to New Members - please post your introductions here

in Announcements & Related News

04-20-2024, 08:50 AM
Hi, my name is Gustavo, I´m a Multi-platform Electronics/Computer Engineer, expert in technology.
As an organized and highly motivated person, I am able to adapt to any circumstance and always give my best to any project, while at the same time I strive to work as a team and foster values such as camaraderie.
I consider myself responsible, with a proactive spirit, and with a great capacity for learning.
I had the opportunity to do my work practices at a national and international level in well-prestigious companies and learn from the best professionals.
I´ve learned a...

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gbuniva replied to Macbook 820-2327-A Schematics

in Schematic Requests ONLY!

12-09-2023, 11:00 AM
Thank you

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gbuniva replied to Macintosh - Various - Schematics - Boardviews

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12-09-2023, 10:59 AM
Thank You

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gbuniva replied to 820-01958 MBA 13" '20 A2179 Schematics/bv request

in Schematic Requests ONLY!

04-27-2022, 02:04 AM
Re: 820-01958 MBA 13" '20 A2179 Schematics/bv request

Thank you for this one Friend !

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gbuniva replied to A1534 820-00045-a efi bios dump need

in BIOS Requests ONLY!

10-04-2021, 08:20 PM
Re: A1534 820-00045-a efi bios dump need

Thank's peste!

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gbuniva replied to A1534 820-00045-a efi bios dump need

in BIOS Requests ONLY!

10-02-2021, 09:13 AM
Re: A1534 820-00045-a efi bios dump need

Hi, i need to unlock this MacBook:

A1534 EMC 2746
S/N C02Q3890GCN4
LOGICBOARD 820-00045-A

thanks in advance...

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gbuniva replied to Apple MBA 11 820-00164 Boardview

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08-18-2021, 08:15 AM
Re: Apple MBA 11 820-00164 Boardview

Thank You!

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gbuniva replied to dablidmb8e0 schematic needed

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03-26-2020, 07:37 AM
Re: dablidmb8e0 schematic needed

Thank you rioreno !

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MacBook A1502 (820-3476-A) Repair case with solution

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