Dell Latitude 5400 Bios password

[SMDFlea]

TPM ERROR PLZ HLEP

Please read the rules https://www.badcaps.net/forum/troubl...before-posting ,and post the service tag.

Also, is your caps lock stuck on - you should ask for a solution to this?

[rehan985]

I have a dell 5400 with system number 66MRL33-8FC8 please help me to get the bios password

[peste]

I have a dell 5400 with system number 66MRL33-8FC8 please help me to get the bios password

post motherboard model,etc.

post the original contents of the bios chip..

[Iboun Housseini]

hello i need to unlock my bios, dell latitude 5400, motherboard number: EDC41 LA-G892P Rev 1.0

[peste]

hello i need to unlock my bios, dell latitude 5400, motherboard number: EDC41 LA-G892P Rev 1.0

post S/T, full name and model, motherboard model, etc.

[Peperoni23]

dell latitude 5400
ST: 3TQD433
mother board : LA-G891P 1.0
please clean bios password all masters friends

[SMDFlea]

thread merged..next time look for a thread with the name and model, motherboard model,of the laptop and post there, if you can't find it, then and only then make a new thread..

[danito]

do it yourself
https://www.badcaps.net/forum/troubl...l-8fc8-patcher

[amirheidari681]

BRAND: DELL
📌 MODEL: LATITUDE 5400
📌 Motherboard Part Number: LA-G892P
📌 SERVICE TAG: BGT5L13
📌 PROBLEM: BIOS PASSWORD

[SMDFlea]

BRAND: DELL
📌 MODEL: LATITUDE 5400
📌 Motherboard Part Number: LA-G892P
📌 SERVICE TAG: BGT5L13
📌 PROBLEM: BIOS PASSWORD

Thread merged. Read the post above and the password guides and you should be able to unlock it yourself https://www.badcaps.net/forum/troubl...rces-and-tools

[Alejandro Luo]

Hi everyone, I´m new for this forum

I'm working on unlocking the BIOS password (lock code: 8FC8) on a Dell Latitude 5400, and I'm trying to do it myself. The motherboard model is LA-G891P REV 0.1.

I've purchased a few tools from AliExpress:

• A CH341A programmer with a 5V to 3.3V voltage converter:
  https://es.aliexpress.com/item/1005008172690265.html
• A WSON 8x6mm clip adapter, to avoid desoldering the chip (since I'm not very good at soldering):
  https://es.aliexpress.com/item/1005008517042667.html

I downloaded AsProgrammer v2.1.0.13, installed the drivers, and confirmed that the CH341A shows up correctly in Device Manager.

However, when I connect the programmer to the chip, AsProgrammer shows:

SPI Flash ID (9F): 000000

Then it prompts me to “Search IC.” The problem is, my chip is a GD 25B256DYIG, and it does not appear in the list. I also tried the "Detect" button, but nothing happens.

I'm not sure what IC to select manually in AsProgrammer, or what I'm doing wrong.
Any help would be really appreciated.

Thanks in advance!

[peste]

try an equivalent chip that you have in your database..

[09hitchesk]

Hi can anyone help with unlocking the bios on my Latitude 5400
Service Tag - 1HWTK33
Bios Suffix - 8FC8
Motherboard Model - LA-G891P

[SMDFlea]

Thread merged with existing topic.

[09hitchesk]

File Uploaded

[Alejandro Luo]

Hi again, and thanks for your help, Peste.

I chose a different compatible chip — the Winbond 25Q256 — which I saw is similar to the 25B256DYIG.
I managed to extract the BIOS, but I'm not sure if the dump was done correctly, because the file contains a lot of zeros and doesn't look like other BIOS dumps I've seen online.

Could someone please take a look and confirm if it was read properly? I just want to make sure I have a valid copy of the original (locked) BIOS so I can proceed with unlocking it.

Thanks a lot in advance!

[hoaca388]

Hi again, and thanks for your help, Peste.

I chose a different compatible chip — the Winbond 25Q256 — which I saw is similar to the 25B256DYIG.
I managed to extract the BIOS, but I'm not sure if the dump was done correctly, because the file contains a lot of zeros and doesn't look like other BIOS dumps I've seen online.

Could someone please take a look and confirm if it was read properly? I just want to make sure I have a valid copy of the original (locked) BIOS so I can proceed with unlocking it.

Thanks a lot in advance!

Just looking at this you know your backup failed.