Dell Latitude 5400 Bios password

[volinakis]

This is the second bios

try. Write only 16Mb chipset.

[TAHAR AMAR]

BONJOUR
DELL LATITUD 5400
MODEL LA G891P
SERVICE TAG 1WQ0433
PROBLEM BIOS PASSWORD

[shiyab]

BONJOUR
DELL LATITUD 5400
MODEL LA G891P
SERVICE TAG 1WQ0433
PROBLEM BIOS PASSWORD

post backup bios

[Ryeo]

Hello I already patch my bios I have Dell Latitude 5400 8fc8 the admin password has been removed but I couldn't install Operating System it either goes bluescreen or no bootable device. The usb bootable drive is detected and I can install the OS but after restart it goes BSOD

[robert1000]

Hello guys. I bought a Latitude 5400 from a site. I turn it on and it says "this computer is protected by a password authentication system".
Can you help me remove this password? Besides the model number, S/T, board model, which of the two flash chips should i remove and read to post here the content? There are 2 bios chips on the board. Thank you!

[Lover1abd]

DELL LATITUD 5400
MODEL LA G891P
SERVICE TAG C8SD433
PROBLEM BIOS PASSWORD

THANKSS

[hoaca388]

DELL LATITUD 5400
MODEL LA G891P
SERVICE TAG C8SD433
PROBLEM BIOS PASSWORD

THANKSS

3.4. Dell

Dell laptops store the password in EC. However, some generators exist depending on the code suffix.
See: https://beta.bios-pw.org/ .If the website is offline try: https://web.archive.org/web/*/https://bios-pw.org/
Note: All passwords must be entered with a US QWERTY Keyboard,you can use a USB one.
Note: The 6FF1 suffix has a bug,use your service tag with the 1F5A or BF97 suffix instead,Example: 1234ABC-BF97 .
Note: The list of examples does not include some other suffix codes that do work,such as E7A8 .
Note: If the BF97 suffix does not work try it with the E7A8 suffix instead.
Note: There is no publicly available 8FC8 generator available at the moment.
The CTRL-ENTER-ENTER keystroke after the password only applied to laptops with a suffix (xxxxxxx-8FC8 for example), until Dell also required it in some laptops using System Disable 16-Hex algorithm, on which only the Password+ENTER was needed at first and then in some models you needed the CTRL-ENTER-ENTER to properly delete the system passwords, otherwise the password would remain SET upon the automatic system reboot if just doing Password+ENTER until the proper CTRL-ENTER-ENTER keystroke was performed in certain models.
8FC8 Patcher software: https://www.badcaps.net/forum/troubl...l-8fc8-patcher

[shiyab]

DELL LATITUD 5400
MODEL LA G891P
SERVICE TAG C8SD433
PROBLEM BIOS PASSWORD

THANKSS

hi try

[Stefan Steff]

DELL LATITUD 5400
MODEL LA G891P
SERVICE TAG C8SD433
PROBLEM BIOS PASSWORD

THANKSS

At first boot press F2, write your Service Tag, disable Absolute if it was activated, Save and Exit.

[Lover1abd]

3.4. Dell

Dell laptops store the password in EC. However, some generators exist depending on the code suffix.
See: https://beta.bios-pw.org/ .If the website is offline try: https://web.archive.org/web/*/https://bios-pw.org/
Note: All passwords must be entered with a US QWERTY Keyboard,you can use a USB one.
Note: The 6FF1 suffix has a bug,use your service tag with the 1F5A or BF97 suffix instead,Example: 1234ABC-BF97 .
Note: The list of examples does not include some other suffix codes that do work,such as E7A8 .
Note: If the BF97 suffix does not work try it with the E7A8 suffix instead.
Note: There is no publicly available 8FC8 generator available at the moment.
The CTRL-ENTER-ENTER keystroke after the password only applied to laptops with a suffix (xxxxxxx-8FC8 for example), until Dell also required it in some laptops using System Disable 16-Hex algorithm, on which only the Password+ENTER was needed at first and then in some models you needed the CTRL-ENTER-ENTER to properly delete the system passwords, otherwise the password would remain SET upon the automatic system reboot if just doing Password+ENTER until the proper CTRL-ENTER-ENTER keystroke was performed in certain models.
8FC8 Patcher software: https://www.badcaps.net/forum/troubl...l-8fc8-patcher

Didn't work out

Thanks

[Lover1abd]

hi try

After flashing no display

[Lover1abd]

At first boot press F2, write your Service Tag, disable Absolute if it was activated, Save and Exit.

Only power light with no display

Could be chip went bad ????

[Lover1abd]

3.4. Dell

Dell laptops store the password in EC. However, some generators exist depending on the code suffix.
See: https://beta.bios-pw.org/ .If the website is offline try: https://web.archive.org/web/*/https://bios-pw.org/
Note: All passwords must be entered with a US QWERTY Keyboard,you can use a USB one.
Note: The 6FF1 suffix has a bug,use your service tag with the 1F5A or BF97 suffix instead,Example: 1234ABC-BF97 .
Note: The list of examples does not include some other suffix codes that do work,such as E7A8 .
Note: If the BF97 suffix does not work try it with the E7A8 suffix instead.
Note: There is no publicly available 8FC8 generator available at the moment.
The CTRL-ENTER-ENTER keystroke after the password only applied to laptops with a suffix (xxxxxxx-8FC8 for example), until Dell also required it in some laptops using System Disable 16-Hex algorithm, on which only the Password+ENTER was needed at first and then in some models you needed the CTRL-ENTER-ENTER to properly delete the system passwords, otherwise the password would remain SET upon the automatic system reboot if just doing Password+ENTER until the proper CTRL-ENTER-ENTER keystroke was performed in certain models.
8FC8 Patcher software: https://www.badcaps.net/forum/troubl...l-8fc8-patcher

Actually its does works
With dell patcher but i had to wipe the chip first
Thank you so much

And thanks for everybody for helping me

[Kinshir]

Hello,

I tried to remove the BIOS password on my Dell Latitude 5400 using the patcher.
Got a the bios dump with the programmer
And unlocked it with the patcher

But now whether I upload the initial dump or the unlocked dump, when I connect the power, the front led is white, the power button and the keyboard lights up for 1-2 seconds, the fan also starts for 1-2 seconds and it keeps repeating.
Please help.

Service Tag: J9XQ433
Board: LA-G891P

Thank you very much!

[peste]

Hello,

I tried to remove the BIOS password on my Dell Latitude 5400 using the patcher.
Got a the bios dump with the programmer
And unlocked it with the patcher

But now whether I upload the initial dump or the unlocked dump, when I connect the power, the front led is white, the power button and the keyboard lights up for 1-2 seconds, the fan also starts for 1-2 seconds and it keeps repeating.
Please help.

Service Tag: J9XQ433
Board: LA-G891P

Thank you very much!

You copied the bios with errors.
The bios chip must be unsoldered from the board before writing or reading..
do not use the clip, you may have errors..if you do not have anything to unsolder it with,
solder wires between the programmer and the bios chip..
.here is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow

[Kinshir]

You copied the bios with errors.
The bios chip must be unsoldered from the board before writing or reading..
do not use the clip, you may have errors..if you do not have anything to unsolder it with,
solder wires between the programmer and the bios chip..
.here is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow

I understand, but since I copied the original BIOS with errors, after I unsolder it, what BIOS I should write on it?
Can you help me with a suggestion?

Thank you!

[LBTT1121]

Hello,

I tried to remove the BIOS password on my Dell Latitude 5400 using the patcher.
Got a the bios dump with the programmer
And unlocked it with the patcher

But now whether I upload the initial dump or the unlocked dump, when I connect the power, the front led is white, the power button and the keyboard lights up for 1-2 seconds, the fan also starts for 1-2 seconds and it keeps repeating.
Please help.

Service Tag: J9XQ433
Board: LA-G891P

Thank you very much!

try and feedback

[Kinshir]

Hello,

I wrote the BIOS on the chip using the WSON8 probe, verified it twice but still the same behavior.
I don't have knowledge of soldering to try and unsolder it, but I suspect that I might have damaged the chip connections to the motherboard with the probe, hence I will try with a local service to have it checked.
I'm attaching two pics of the BIOS chip for your opinion.


Thank you very much for all the help.

[Markus1741]

Hello,

I wrote the BIOS on the chip using the WSON8 probe, verified it twice but still the same behavior.
I don't have knowledge of soldering to try and unsolder it, but I suspect that I might have damaged the chip connections to the motherboard with the probe, hence I will try with a local service to have it checked.
I'm attaching two pics of the BIOS chip for your opinion.


Thank you very much for all the help.

Hello you can try this new build bios from your corrupt original bios good luck ....