Dell Latitude 5400 bios request

[shiyab]

HI TRY THIS update

try this

[QK Hafeez]

DONT WORK THIS LAST FILE

[shiyab]

DONT WORK THIS LAST FILE

use the dmi tool

[aung khine]

Hello everyone!

Could someone please help to delete the password 8CF8 suffix?

Dell Latitude 5400
edc41 la-g891p rev.1 A00
Service Tag : 629B0R2

[hoaca388]

Hello everyone!

Could someone please help to delete the password 8CF8 suffix?

Dell Latitude 5400
edc41 la-g891p rev.1 A00
Service Tag : 629B0R2

Unlocked

[Hot Toddy]

Hi,
I have been given a Dell Latitude from a family member that I'm trying to recover into a useable laptop, as it's currently password protected and completely locked down. I have tried to obtain a viable password from https://beta.bios-pw.org/ using the laptop serial number (with suffix xxxxxxx-8FC8) but nothing would work for me. So now I am trying to read the current BIOS off the device before attempting to follow the guidelines on this forum to refresh the BIOS to something that works again. However, I'm having real problems reading the existing BIOS from the chip as it's a WSON8 (very low-level) IC with pins that are very difficult to get at. I have a XGecu TL866 II Plus programmer that perports to support the chip - a GigaDevice GD25B256D WSON8.

With a bit of ingenuity, and a lot of patience, I have 3-D printed an adapter that sits tightly on the chip, holding 1mm pogo pins to each leg of the IC. With this wired-up to my programmer and a bit of trial and error, I finally got it to (apparently) perform a full read of the chip which appeared to complete successfully. The software I'm using is Xgpro v12.67. But when it completes the read there is nothing other than "FF"'s in the buffer. So I assume that read was not successful. Then I wondered whether the programmer was actually supplying VCC to the chip when attempting the read. So I checked, and it was not. So I then connected an external 3.3v power supply across the relevant pins (pin 4 ground, pin 8 Vcc) and tried again. Unfortunately, there was no change. The programmer indicated it had successfully read the chip but the buffer again had no readable contents.



So I'm somewhat stuck with what to try next and need some help from the experience of this forum. Am I appraoching this in the right way? Should it be possible to read the BIOS from the chip in-situ? Would you expect the programmer should be powering the chip for read/write? I have considered attempting to de-solder the chip from the board to perform the BIOS read/write but have read on the forum that the laptop motherboard is highly multi-layered and requires a LOT of heat to remove. Unfortunately, I only have a cheap-and-cheerful hot air flow solder station. So probably not up to the job. And I don't want to damage the board attempting this, unless a last resort. Even then, I don't (yet) have a WSON8 native adapter for my programmer. So what would you guys suggest?

Very much appreciate any insights into what I'm doing wrong, what I could/should do different, or any other pointers you can offer to get me over this hurdle.

TIA

[peste]

Hi,
I have been given a Dell Latitude from a family member that I'm trying to recover into a useable laptop, as it's currently password protected and completely locked down. I have tried to obtain a viable password from https://beta.bios-pw.org/ using the laptop serial number (with suffix xxxxxxx-8FC8) but nothing would work for me. So now I am trying to read the current BIOS off the device before attempting to follow the guidelines on this forum to refresh the BIOS to something that works again. However, I'm having real problems reading the existing BIOS from the chip as it's a WSON8 (very low-level) IC with pins that are very difficult to get at. I have a XGecu TL866 II Plus programmer that perports to support the chip - a GigaDevice GD25B256D WSON8.

With a bit of ingenuity, and a lot of patience, I have 3-D printed an adapter that sits tightly on the chip, holding 1mm pogo pins to each leg of the IC. With this wired-up to my programmer and a bit of trial and error, I finally got it to (apparently) perform a full read of the chip which appeared to complete successfully. The software I'm using is Xgpro v12.67. But when it completes the read there is nothing other than "FF"'s in the buffer. So I assume that read was not successful. Then I wondered whether the programmer was actually supplying VCC to the chip when attempting the read. So I checked, and it was not. So I then connected an external 3.3v power supply across the relevant pins (pin 4 ground, pin 8 Vcc) and tried again. Unfortunately, there was no change. The programmer indicated it had successfully read the chip but the buffer again had no readable contents.



So I'm somewhat stuck with what to try next and need some help from the experience of this forum. Am I appraoching this in the right way? Should it be possible to read the BIOS from the chip in-situ? Would you expect the programmer should be powering the chip for read/write? I have considered attempting to de-solder the chip from the board to perform the BIOS read/write but have read on the forum that the laptop motherboard is highly multi-layered and requires a LOT of heat to remove. Unfortunately, I only have a cheap-and-cheerful hot air flow solder station. So probably not up to the job. And I don't want to damage the board attempting this, unless a last resort. Even then, I don't (yet) have a WSON8 native adapter for my programmer. So what would you guys suggest?

Very much appreciate any insights into what I'm doing wrong, what I could/should do different, or any other pointers you can offer to get me over this hurdle.

TIA

solder wires between the programmer and the chip, if you don't have anything to unsolder it and put it in the adapter..

[peste]

post merged..

[Hot Toddy]

As I stated in the original post …I already soldered wires from the adapter to the chip to power it. Still not reading any legitimate data. (Unless the chip is now actually blank, which I doubt very much.)

[edekzfabrykikred]

Hi Guys,

Finally received my T48 to play with it a bit. I'd like ask you to help with Dell 5400 dump with 8FC8 pass.

Bios chip is GD25B256DYIG
MB: EDC41 LA-G891P Rev 1.0 (A00)
ServiceTag: G7PL633

Tried with Rex98 patcher, removed pass but made something wrong with ME - loud fan, highcpu freq. Not happy with it 😂.

[corona100]

i need please bios dump for this dell i upload the original bios from dell support for this model could any one extracted
dell latitude 5400
service tag ; FKZP433
EXPRESS SERVICE TAG ; 33921016815
MOTHERBOARD ; EDC41 LA-G891P REV 1.0 A00
Uploaded original Dump 8mb + 16mb

[corona100]

original dump no diplay

[SMDFlea]

thread merged.

[hoaca388]

original dump no diplay

Latitude 5400

Service Tag: FKZP433

[edekzfabrykikred]

Hi Guys,

Finally received my T48 to play with it a bit. I'd like ask you to help with Dell 5400 dump with 8FC8 pass.

Bios chip is GD25B256DYIG
MB: EDC41 LA-G891P Rev 1.0 (A00)
ServiceTag: G7PL633

Tried with Rex98 patcher, removed pass but made something wrong with ME - loud fan, highcpu freq. Not happy with it 😂.

Looks like I was wrong. Flashed again bios chip with original locked BIOS and fan+CPU issues still persist, so it's not Rex98 app issue. Also learned how to check ME - looks OK. Mainboard might be faulty, needs RMA.
Thanks anyway!

[aung khine]

Unlocked

Thank you for unlocking the file.
I am having trouble with the programmer machine error.
I was able to write the file today and it worked.
Much appreciated!

[Bilal@pc]

Hello, I don't want to say anything, but how many Dell devices do you actually have to unlock?
Given the number of requests, I would think it would be easier to learn it yourself.
Just my opinion.
You would save yourself a lot of time having to upload it every time.

thinks it work no password

[VICKY JOHN]

Dell Latitude 5400 bios request

Hello everyone
Please help me. I'm having a problem with my computer freezing". I need a working BIOS.
Thanks in advance

Dell 5400
Service Tag : 244K6Y2
MotherBoard : LA-G891P REV:1.0 (A00)

[pandupay]

PLEASE HELP ME TO UNLOCK

Dell 5400
Serial : G705L13
Service Tag : G705L13
Board : LA-G891P

[kingkong computers]

show some time red green and blue color but no display plz fix my bios

Dell LATITUDE 5400
Serial : FFWLM33
Service Tag : FFWLM33
Board : LA-G891P

[minhdigital]

show some time red green and blue color but no display plz fix my bios

Dell LATITUDE 5400
Serial : FFWLM33
Service Tag : FFWLM33
Board : LA-G891P

Try

[kingkong computers]

Try

thanks dear
just black screen no display