Dell Latitude 7400 Bios Password

[vuquanghoanh]

Hi,
My laptop has bios password. G6803Z2-8FC8
Dell Latitude 7400 LA-G871P REV 1.0 (A00)
S/T: G6803Z2
Here is bios dump. Please unlock it.
Thanks,

[Blaze Tech]

Hi,
My laptop has bios password. G6803Z2-8FC8
Dell Latitude 7400 LA-G871P REV 1.0 (A00)
S/T: G6803Z2
Here is bios dump. Please unlock it.
Thanks,

TRY

[vuquanghoanh]

TRY

It works perfectly.
Thank you so much.

[ismaelstepheno]

hi please someone can unlock this bios dump
st:C1GT3X2
THANKS

[SMDFlea]

hi please someone can unlock this bios dump
st:C1GT3X2
THANKS

Compare a locked and unlocked bios with a hex editor,there are only a few bytes to change.Look at the pattern

00 FC AA ** 00 00 00 00
00 FD AA ** 00 00 00 00

00 FC 00 ** 00 00 00 00
00 FD 00 ** 00 00 00 00

[ismaelstepheno]

thank you SMDflea Yes I have done what you said but I have noticed that in some cases a part of the binary is changed with FF and in others there are very simple changes so I am a little confused

[rex98]

hi please someone can unlock this bios dump
st:C1GT3X2
THANKS

1st boot, press F2, write service tag, disable Absolute, save (Apply changes), restart. 2nd boot press Alt+F to exit manufacturing mode.

[ismaelstepheno]

thank you very much rex98

[bitsandbytes206]

• Hi I need 8fc8 bios unlocked for Dell latitude 7400 st: 7BZJ8Y2 mobo: EDC40 LA-G871P Rev 1.0 A00
  Attached is original dump from UC5 MX25L25673G
  Attached Files
  • Dell 7400 locked original.zip (188.0 KB, 5 views)

  ---

• 
  Markus1741
  Badcaps Veteran
  • Join Date: Sep 2020
  • Posts: 712
  • Country: N/A
  
  
  #542
  05-21-2024, 05:36 AM
  Hello, your bios is corrupted. Read again.

  ---

• 
  bitsandbytes206
  New Member
  • Join Date: May 2014
  • Posts: 6
  • Country: US
  
  
  #543
  05-21-2024, 01:22 PM
  Oh no, that was verified before rewriting. Can I take a dump from different machine but same model?

  ---

• 
  Markus1741
  Badcaps Veteran
  • Join Date: Sep 2020
  • Posts: 712
  • Country: N/A
  
  
  #544
  05-21-2024, 01:37 PM
  Yes, if you clean the ME region it works.
  You can also build a new one.
  There is no information such as Windows Key Service Tag stored in your BIOS file.

How can I clean the ME region? I think since my dump is corrupted I just have to create a whole new one? Is there a clean dump available that I can download and make the machine functional again?

[bykanovm]

Good afternoon. Help me unlock BIOS 8FC8 Dell LAtitude 7400. I have a patch that removes this lock, but it didn’t work on this model, this is the first time I’ve encountered this. The laptop just spins the fan and reboots. When I flash the original dump, the laptop turns on normally. Below is the original dump.

ST: 6QZR2Z2

[Blaze Tech]

Good afternoon. Help me unlock BIOS 8FC8 Dell LAtitude 7400. I have a patch that removes this lock, but it didn’t work on this model, this is the first time I’ve encountered this. The laptop just spins the fan and reboots. When I flash the original dump, the laptop turns on normally. Below is the original dump.

ST: 6QZR2Z2

TRY

[hoaca388]

Good afternoon. Help me unlock BIOS 8FC8 Dell LAtitude 7400. I have a patch that removes this lock, but it didn’t work on this model, this is the first time I’ve encountered this. The laptop just spins the fan and reboots. When I flash the original dump, the laptop turns on normally. Below is the original dump.

ST: 6QZR2Z2

XXX

[bykanovm]

Thank you, it works. It will be necessary to figure out why the patch did not work for this BIOS.

[breezy morgan]

06-24-2024, 12:22 AM

Can anyone help with my Dell Latitude 7400 admin password please.

SERVICE TAG: 7QBDK13-8PC8

Nothing works. Please help and thank you in advance.

Breezy Morgan

[SMDFlea]

post your bios backups...

[mwrecker]

Hello can you help me unlock my bios password for Dell Latitude 7400
S/N : 28F33Z2 - 8FC8 prefix

[hoaca388]

Hello can you help me unlock my bios password for Dell Latitude 7400
S/N : 28F33Z2 - 8FC8 prefix

AAA

[mwrecker]

AAA

thank you very much , it works

[isaiahsiewert]

Hello, I have a Dell Latitude 7400 I would like to request some assistance in unlocking the BIOS.
S\N: 3Y90Z2-8FC8

What steps all need to be done for this?

[hoaca388]

Hello, I have a Dell Latitude 7400 I would like to request some assistance in unlocking the BIOS.
S\N: 3Y90Z2-8FC8

What steps all need to be done for this?

Buy a programmer (eg CH341A), find the bios chip, read it, then post the read bios file here. About how to use CH341A, you can ask Youtube.

[Laszlo Hunyadi]

Hello can you help me unlock my bios password for Dell Latitude 7400.
service tag:BKQ73Z2
item number:BBTHK13-8FC8
board:EDC40 LA-G817P REV:1.0(A00)