I am working on Macbook Retina 15" 820-3662-A EMC 2674. It chimes everytime I turn it on but does not boot into any OS (EXTERNAL or Internal SSD). Once only I could boot up into the OS, put in the password & booted up to the desktop. After a complete shutdown, I turned it on again, chimed & then stuck on Apple logo again. First I did a PRAM reset, no luck. I check for any liquid spill on the logic board but very very clean, no trace of any liquid spill. Then I did a Clean ME region of the BIOS & re-programmed the BIOS again, but still get stuck on Apple logo. I am posting the Original BIOS Bin Files for someone to look into & check if this BIOS bin files are the problem or what could be the problem??? Kindly help
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Last edited by mferna14; 06-07-2020, 12:47 PM. -
Re: Macbook Retina 15" 820-3662-A EMC 2674
Try to run ASD EFI and ASD OS.OpenBoardView — https://github.com/OpenBoardView/OpenBoardView -
Re: Macbook Retina 15" 820-3662-A EMC 2674
Try this bios .Comment
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Re: Macbook Retina 15" 820-3662-A EMC 2674
Thanks for all the help., you very imagine, it was the battery that was freezing up the OS in the start. Removed it, booted up fine. Put in a new battery & all works fine now.. ThanksComment
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Re: Macbook Retina 15" 820-3662-A EMC 2674
Can someone Clean the ME Region on this EFI BIOS dump. Macbook Pro Stuck at Apple Logo.Comment
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Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
>>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<
Every donation made will go towards server fees and maintenance costs.Comment
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Re: Macbook Retina 15" 820-3662-A EMC 2674
Can someone post a BIOS dump for 820-3662-A for a 2014 2.2Ghz IG model?Comment
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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 -
Hello everyone,
I am requesting urgent assistance to unbrick my laptop, a rebranded TongFang GK7MRFR chassis. The laptop is completely dead following a faulty in-OS EC flash attempt.
I have successfully used a CH341A programmer and can read/write/verify both flash chips, but using my backups/extractions has failed to restore power. The root cause is likely a corrupted Intel Management Engine (ME) region or an incompatible EC/BIOS pairing. System & Hardware Details- Barebone / Chassis: TongFang GK7MRFR
- MB: MB: GK5MP5X V1.0 Prod :GK5MRFV10T04201310281
- Rebrand: PC Specialist
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Hello everyone,
I recently bought a non-working Asus Zenbook Pro Duo OLED UX8402ZA that was listed for parts only. The seller mentioned that it had no display output but that the charging lights worked.
When the laptop arrived (without a charger and SSD), I connected a charger and confirmed with a multimeter that it was charging the battery. However, when I tried to power it on, only the backlight of the secondary display came on. There was no image, and it didn’t boot into the BIOS.
I decided to try flashing a new BIOS, but since I didn’t want to desolder... -
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... -
Product Name: Razer Blade 15 (2022)
Product ID: RZ09-0421
Motherboard: CH580
BIOS Versions I work with: 2.02 & 2.06
Bios File Size: 32,768 KB
Dear Forum Readers!
I'm looking for a BIOS modder or anyone with experience who would give me suggestions about my razer blade's BIOS settings.
I can view and edit the content of the BIOS .bin file with AMIBCP BIOS editor.
The BIOS files I'm working with are from badcaps.net and those are CLEAN BIOS files (anyone can find it with the search string: RZ09-0421).
!!! MY RAZER BLADE...11-24-2025, 05:52 PM
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