Dell Latitude 5400 bios request

[volinakis]

thank you so much!
To make technical questions can be done on this forum or it is only for requests ? I am comparing the modified file with the original one to see what to change and I see you changed only 4 bytes from AA to 00... Is this right? how you determine which bytes have to be modified ?

Thank you!

group bytes by 4 and you'll get it ...

[gotigroj]

group bytes by 4 and you'll get it ...

Thank you, I found out that will be in groups of 4 but... do i have always look for the same 4 patterns or depends on the laptop will be different? How you know which patterns are the ones that you have to modify? (I saw other 32MB dump on previous page and I saw that they had 3 of the same Byte groups that end in AA changed to 00, but there was one pattern that I did not have in my BIOS.. is there a list or documentation of all the possible variants that need to be modified ?)

Thanks!

[volinakis]

Thank you, I found out that will be in groups of 4 but... do i have always look for the same 4 patterns or depends on the laptop will be different? How you know which patterns are the ones that you have to modify? (I saw other 32MB dump on previous page and I saw that they had 3 of the same Byte groups that end in AA changed to 00, but there was one pattern that I did not have in my BIOS.. is there a list or documentation of all the possible variants that need to be modified ?)

Thanks!

come on, is too simple to miss it! You want informations on a plate instead working a little bit! Download more bioses and compare them against unlocked ones. Start by reading BIOS guides, methods, resources and tools of this forum.

[gotigroj]

come on, is too simple to miss it! You want informations on a plate instead working a little bit! Download more bioses and compare them against unlocked ones. Start by reading BIOS guides, methods, resources and tools of this forum.

Hello,
it might be simple if you worked with it before, but is my first time playing around with bios dumps and flashing... I could only see certain patterns and not sure if the patterns repeat with the type of chip or not.
I did read the post but all the references to my model are towards a program that could patch it, it does not have any information or I could not find any information of why we choose those patterns and why we replace them like that. I am sure I can download other ones and replicate them, but my goal was learn, that's why I made the questions. Sorry if that bothered you.

I have couple more laptops and will practice with those, thanks for the help.

[volinakis]

Hello,
it might be simple if you worked with it before, but is my first time playing around with bios dumps and flashing... I could only see certain patterns and not sure if the patterns repeat with the type of chip or not.
I did read the post but all the references to my model are towards a program that could patch it, it does not have any information or I could not find any information of why we choose those patterns and why we replace them like that. I am sure I can download other ones and replicate them, but my goal was learn, that's why I made the questions. Sorry if that bothered you.

I have couple more laptops and will practice with those, thanks for the help.

really? Are you having troubles to understand what you read?

[gotigroj]

really? Are you having troubles to understand what you read?

Hello,
I broke the chip of the BIOS that you modified when trying to solder it back,

I have other Latitude 5400s and I could follow and replace the 00 FC AA and 00 FD AA Patterns, I have flashed the modified BIOS but the screen will keep black and booting constantly... I tried to press F1 during boot and also pressing F2 during the boot but the screen will not turn back on... There is no signs of POST or any screen output at all... I can only hear the fans going on and then the computer will power off by itself after 30 seconds.

Does this mean that I did modified the bios in a wrong way or that the BIOS file got corrupted while flashing ? Or is there any other step that I am missing in between?

EDIT: Forgot to mention that ignored when the 00FDAA patterns looked like this for example:
7EB26400 FDAA3F82 . Is that right? Also, what would be the start and end of the 0xXXXXXXX to start and end modifying this patterns? I think that could be the main problem that I am facing.



Thanks.

[Rameez Ahmed]

HELLO SIR
DELL LATITUDE
`5400
SERVICE TAG :- 6H8C3X2
MOTHERBOARD CODE :- EDC41 LA-G891P REV :1.0 (A00)
NO DISPLAY
PLEASE CHECK BIOS AND REPAIR
THANK YOU IN ADVANCED

[peste]

HELLO SIR
5400
LA-G891P
NO DISPLAY
PLEASE CHECK BIOS AND REPAIR
THANK YOU IN ADVANCED

read the rules..https://www.badcaps.net/forum/troubl...before-posting

post the Service Tag..the full name and model of the laptop,

[aquif]

DELL LATTITUDE 5400
SERVICE TAG-23BQ1X2
BOARD PART NUMBER- LA-G891P
BLANK DISPLAY PLEASE BUILD THE BIOS
THANKS

[kalilinux25]

DELL LATTITUDE 5400
SERVICE TAG-23BQ1X2
BOARD PART NUMBER- LA-G891P
BLANK DISPLAY PLEASE BUILD THE BIOS
THANKS

try and test

[aquif]

try and test

THANKS ITS WORKING.....

[kalilinux25]

THANKS ITS WORKING.....

nice great to here it

[Kamlesh Soni]

Hell guys I'm having a trouble I have 5400 8fc8 locked I have tried many bios it's working but I lost the audio
serial : 5HB0N33
service tag 5HB0N33

[hoaca388]

Hell guys I'm having a trouble I have 5400 8fc8 locked I have tried many bios it's working but I lost the audio
serial : 5HB0N33
service tag 5HB0N33

Unlocked.

[Al-Umar]

Help please, the Original bios file of this pc as bean removed.
The PC as been tooken to somewhere before so i need someone to get me the bios file those one i get from the site are not working fine with the pc, could someone matching one
Here is info:
EDC41 LA-G891P Rev:1.0(A00)
S/T: 2LHJL33
Dell Latitude 5400

[SMDFlea]

Thread merged.

[hoaca388]

Help please, the Original bios file of this pc as bean removed.
The PC as been tooken to somewhere before so i need someone to get me the bios file those one i get from the site are not working fine with the pc, could someone matching one
Here is info:
EDC41 LA-G891P Rev:1.0(A00)
S/T: 2LHJL33
Dell Latitude 5400

Latitude 5400

[danielgagcia]

Hello everyone!

Could someone help to delete this bios password ?

Dell 5400
Service Tag : J8D7N53
Mainboard : EDC41 LA-G891P Rev: 1.0 (A00)

[hoaca388]

Hello everyone!

Could someone help to delete this bios password ?

Dell 5400
Service Tag : J8D7N53
Mainboard : EDC41 LA-G891P Rev: 1.0 (A00)

Unlocked.

[danielgagcia]

Unlocked.

Thanks my guy works perfectly!

[Alexsander Espindola]

Hello everybody! Can anyone help to erase this bios password? I'm trying to do a Raid0 but I can't access it due to the password


Here is the information:

Dell 5400

Serial: 5R94S63

Service Tag: 5R94S63 *(8FC8)*

Motherboard: EDC41 LA-G891P Rev: 1.0 (A00)

Winbond 25Q256JV