[REQUEST] Lenovo B50-70 (9DCNxxWW) BIOS Unlock

[Esmat]

Dear
I hope this email finds you well. I am writing to request your assistance regarding an issue with my Lenovo B50 device (Serial Number: CB32698332).

Issue Details:
1. Current BIOS Version:*9DCN21WW (V2.02)

2. Problem:
- When attempting to update the BIOS using the official Lenovo website’s update tool, the device restarts but displays a "Failed" message.

- My system runs *Windows 10 (64-bit), and I followed all instructions (running as administrator, enabling BIOS flash, etc.).

- Boot Delay:* The device shows a black screen for 10+ minutes*before Windows starts, even though the hardware (HDD, RAM, etc.) works fine on another device. I’ve tried discharging static electricity and resetting the CMOS battery.

Request:
I kindly ask for your support in:
- Providing a working BIOS update solution or an alternative method.
- Troubleshooting the boot delay issue if unrelated to the BIOS.

I appreciate your prompt attention to this matter. Please let me know if you require further details.

Best regards,

[r0lf1]

Hi! I have a Lenovo B50-70: 20384, BIOS V3.04
I'm trying to add a WLAN pci card: Intel 7260NGW ( 8SSW10A11499 )
BIOS version 9DCN34WW(V3.04)
EC version 9DEC34WW(V3.04)

Could you please help me unlock my BIOS??

This my bios dump

[Dudu2002]

Hi! I have a Lenovo B50-70: 20384, BIOS V3.04
I'm trying to add a WLAN pci card: Intel 7260NGW ( 8SSW10A11499 )
BIOS version 9DCN34WW(V3.04)
EC version 9DEC34WW(V3.04)

Could you please help me unlock my BIOS??

Hi
Using the Universal BIOS Backup ToolKit 2.0 for your laptop model is not desirable...use BACKUP_Tools19 or fpt only

[B50-70User]

I also have a Lenovo B50-70 (model 20384) with BIOS V3.04 (9DCN34WW)

Need the BIOS whitelist function removed and advanced/hidden functions enabled.

Dumped with BACKUP_Tools12.exe (couldnt find BACKUP_Tools19.exe)

https://www.sendspace.com/file/x2ly6s 


  results.rar (Size: 6.56 MB / Downloads: 3)

[Dudu2002]

I also have a Lenovo B50-70 (model 20384) with BIOS V3.04 (9DCN34WW)

Need the BIOS whitelist function removed and advanced/hidden functions enabled.

Dumped with BACKUP_Tools12.exe (couldnt find BACKUP_Tools19.exe)

Hi
Your mod completed. Check your messages

This mod for this notebook ONLY !!!

[billibons]

Hello! We kindly ask you to remove the white list in order to install another Wi-Fi adapter and unlock the advanced menu. The laptop model is Lenovo B50-70, with BIOS V3.04.

[MrVK13]

Hi, please help me @Dudu2002, my caddy doesn't see the hdd. Sometimes it appears and then disappears.
I took a dump using the Universal BIOS Backup ToolKit 2.0, but if it doesn't work, I can take a dump using a programmer.
Thank you in advance!


that my bios

[Dudu2002]

Hi, please help me @Dudu2002, my caddy doesn't see the hdd. Sometimes it appears and then disappears.
I took a dump using the Universal BIOS Backup ToolKit 2.0, but if it doesn't work, I can take a dump using a programmer.
Thank you in advance!

Hi
Your mod completed.
Check your messages

This mod for this notebook ONLY !!!

[kmz7]

@Dudu2002, help please with this, I need whitelist removal and 2nd hdd fix. And advanced menu if possible.
Here is my dump.
https://www.sendspace.com/file/jc7khwtf
Thank you.

[kmz7]

Because I did not get a help yet, I digged a bit into it to make my own mod, with blackjack and hookers.
I used UEFItool and just removed UEFIL05BIOSLock module and whitelist block is gone. I noticed no any side effects from removing a module instead of patching it.
Advanced menus unlocked by holding R+N keys during power-on following by F2 (or Fn+F2 if media keys enabled) when Lenovo logo appears, so no any modification required for it. But this is not permanent, you need to do this trick again to access advanced options next time.
Saying about second HDD/SSD... In my case it just working as-is properly, no any issues found. So I not know a source of issues that some users experienced and what must be fixed. My optibay has 3position switch but it does not change anything. Only thing I can assume that it is related to ZPODD function (and it is enabled by default in NVARs). But motherboards of some revisions may have no parts required for this, so it's owners has no issues with optibays. May be change of this variable to Disabled can help others.
I did everything in my dump and flashed it with spi programmer. This was a one-time thing so I haven't a deal with bios runtime write protections and checksums/signatures. I just want to share my experience for someone who want to do this too, or can make a more user friendly solution like modded flashable bios package.