macbook pro a1502 main board is 820-4924-A but locked any body help thanks in advance
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Re: macbook 13inch retina a1502
Sorry i didn't see you already did upload ...ok here are the steps now password is gone no need to do anything else with your file just reflash it and follow my steps after you do so or the cloud will reset it again once you go online.
steps:Make sure to do this steps after reflash:
Resetting NVRAM
i) Shut down your Apple Mac.
ii) Locate the following keys on the keyboard: Command, Option, P, and R.
iii) Turn on your Mac.
iv) Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
v) Hold these keys until the computer restarts and you hear the startup sound for a second time.
vi) Release the keys.
And after that... reinstall the OS is a must to have no other problems.
Techman1025Comment
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Re: macbook 13inch retina a1502
Here
techman1025Comment
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Re: macbook 13inch retina a1502
thx a lot but this is 820-4924 i need 820-3662-AComment
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Re: macbook 13inch retina a1502
oooo sory sory i forget thx i wil check and let u knowComment
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Re: macbook 13inch retina a1502
thx a lot its work thx u so muchComment
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Hello everyone,
I’m currently working on a dead MSI GP75 Leopard (MS-17E71) motherboard (i7 CPU, NVIDIA GPU) with a no display/no backlight issue initially. After extensive investigation, I’m at a critical stage involving EC firmware, BIOS/ME region interaction, and possible deep corruption. I'm seeking advanced insight from anyone with experience in EC/BIOS sync issues or PCH-level behavior. Here’s a full breakdown:
🧩 Initial Issue- Board powers on (fans spin, keyboard lights up and can be adjusted, caps lock led lights), but no display or backlight
- External display (HDMI) shows
07-24-2025, 02:17 PM -
Apple MacBook Pro Retina 13' A1502 820-3536-A Schematic...10-12-2024, 11:43 AM
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First of all thanks to all of our members who have posted previously all methods posted here.
Please leave a comment if you find something new,or have anything else to add.
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Find by serial number,model number or series
If you know the laptop serial or model number go to HP support https://support.hp.com/us-en/drivers/laptops .
Enter the serial number or model number and click submit.On the next screen you will have to enter the OS
Operating system and OS version.If... -
Hi friends,
Please could someone help me with my BIOS lock ?
I unsoldered MX25L6473E bios chip from 2015 board and read data trought CH341.
Now I have bios dump hex.
SN: C02R3XZHFVH5
Can someone send me working bios please?
Thank you so much.
Tom.... -
Hi, my laptop wont boot at all
With original bios no POST, only LED lights
With alternative BIOS from model TP500LN (flashed via programmer) the notebook works again
Some issues
A- with bios from 500LN, it won't update from bios of model 500LA (from 500LN v203 to 500LA v300)
B- If updated from 500LN version 203 to 300, the battery stops being recognized
Things I tried
1- Update / clear ME: Took the non working bios, made a backup, and did this: https://www.badcaps.net/forum/troubl...theory/trouble...
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