Dell Latitude 5400 Bios password

[Markus1741]

I've try link above but doesn't want to generate the patch file for the 16M chip, it does for the 8M chip instead. Below is the error:

Rex98 **Dell-8FC8-Patcher**
@Tecshack Cebu
Pag huwat ky ga patch pa!...in file W25Q128JV@SOIC8_61F0533_PSW_V2.BIN
wa nakit-an ang intel signature
Pinduta bisan unsang key para ma exit...

Please help me understand what I have to do next.

In the meantime if someone can patch both file for me

Model: Dell Latitude 5400
Board: EDC41LA-G891P
REV: 1.0 (A00)
SERVICE TAG: 61F05-8FC8

Thanks

Hello,
Now you can see how well the Rex98 software works.
The 16MB Bios chip doesn't need to be patched because nothing is found in it.
If you have 2 chips, as in your case, you have to consider which of the two should be processed.
In your case only the 8MB chip needs to be written back.

[moshu]

https://www.badcaps.net/forum/troubl...s-out-for-free

I've try link above but doesn't want to generate the patch file for the 16M chip, it does for the 8M chip instead. Below is the error:

Rex98 **Dell-8FC8-Patcher**
@Tecshack Cebu
Pag huwat ky ga patch pa!...in file W25Q128JV@SOIC8_61F0533_PSW_V2.BIN
wa nakit-an ang intel signature
Pinduta bisan unsang key para ma exit...

Please help me understand what I have to do next.

In the meantime if someone can patch both file for me

Model: Dell Latitude 5400
Board: EDC41LA-G891P
REV: 1.0 (A00)
SERVICE TAG: 61F05-8FC8

Thanks

[moshu]

https://www.badcaps.net/forum/troubl...s-out-for-free

Great, in the case of laptops with 2 BIOS chip I suppose I will have to patch both, I suppose

[hoaca388]

Thanks Marcus,

I will really want to learn how you did that, because I still have 11 laptops to fix (same model), some with 2 bios chips some with one.
Is there a tutorial for beginners somewhere to follow?

Last night I've been able to fix other 2 laptops testing some of the bin files already shared on this thread, and found 2 files compatible (Latitude E5400_256_CLEAN.rar & BACKUP_DELL LATITUDE 5400 EDC41 LA-G891P REV 1.0(A00) 2019-03-28.rar)

https://www.badcaps.net/forum/troubl...s-out-for-free

[moshu]

Hello try this unlocked file ....

Thanks Marcus,

I will really want to learn how you did that, because I still have 11 laptops to fix (same model), some with 2 bios chips some with one.
Is there a tutorial for beginners somewhere to follow?

Last night I've been able to fix other 2 laptops testing some of the bin files already shared on this thread, and found 2 files compatible (Latitude E5400_256_CLEAN.rar & BACKUP_DELL LATITUDE 5400 EDC41 LA-G891P REV 1.0(A00) 2019-03-28.rar)

[Markus1741]

Hi all,

please help to remove pasword on below 5400.
I've tryed
1- Select the range 00045000 to 00048fff
2- Select "Edit" then "Fill"
3- Put "ÿ" in "Pattern" zone.
4- Choose "Fill selection" then clic on "Fill" button.
5- Save the new file."

but laptop didnt start

Model: Dell Latitude 5400
Board: EDC41LA-G892P
REV: 1.0 (A00)
SERVICE TAG: 9QGW3Z2-8FC8
read one CHIP GD25Q256DY1G

Thanks

Hello try this unlocked file ....

[moshu]

Hi all,

please help to remove pasword on below 5400.
I've tryed
1- Select the range 00045000 to 00048fff
2- Select "Edit" then "Fill"
3- Put "ÿ" in "Pattern" zone.
4- Choose "Fill selection" then clic on "Fill" button.
5- Save the new file."

but laptop didnt start

Model: Dell Latitude 5400
Board: EDC41LA-G892P
REV: 1.0 (A00)
SERVICE TAG: 9QGW3Z2-8FC8
read one CHIP GD25Q256DY1G

Thanks

[SMDFlea]

I need bios for la-g862p rev : 1.0 latitude 5400
it is working but somebody changed before .

only turning on after 30sec
SN: 9CS6063

Have you tried cleaning the ME firmware https://www.badcaps.net/forum/troubl...22#post1622422

[mactouch]

I need bios for la-g862p rev : 1.0 latitude 5400
it is working but somebody changed before .

only turning on after 30sec
SN: 9CS6063

[rex98]

Dell 5400 edc41 la-g891p rev 1 16mb bios dump
please remove bios lock
service tag:2T3C5Y2

thanks in advance

upload the 8mb.

[SMDFlea]

post the service tag please, as per the forum rules

[GB1999]

Dell 5400 edc41 la-g891p rev 1 16mb bios dump
please remove bios lock
service tag:2T3C5Y2

thanks in advance

[ifixeth]

Dell Latitude 5400 Bios password
LA-G891p
32mb
Please!! Please Remove password or extract password from bin!!! Please

[moshu]

Because it is a cheap SPI programmer, the CH341A sometimes does not work well with clips

Thanks for your replay.
Looks like I have 2 options , either to buy another programmer or buy a hot air station or both.
Please recommend another programmer to buy and a budget hot air station to buy.
Links would be preferable.

Thanks

[hoaca388]

Hi all,

I was reading all 35 pages but is not clear to me if is really need it to remove the chip/chips from the motherboard.
One fact is clear that I cannot read the chip if is on the motherboard using CH341 programmer, because once I connect the wires to programmer, programmer is not recognized by the Windows unless I've attache the power supply to the motherboard I am reading the BIOS chip. Even that I am getting an error like chip is not recognized
Motherboard have a UC5 (25B64CYiG) and an UC6 (25B127DS1G) and UT6 (25Q80DVSIG)
I was trying to clip the UC6 (25B127DS1G) to CH341 but is not recognized. I was trying attaching wires and the same.

I am not sure CH341 is good enough to read the BIOS and post it here. Please share a better tool to do the job.

Model: Dell Latitude 5400
Reg typr No: P98G001
Board: EDC41LA-G891P
REV: 1.0 (A00)
SERVICE TAG: 7404yy2 or 74o4yy2 (not sure )

Thanks

Because it is a cheap SPI programmer, the CH341A sometimes does not work well with clips

[moshu]

Re: Dell Latitude 5400 Bios password



Did you desolder the chip from the board or are you reading it soldered? If so, you must remove it from the motherboard and read it out.

Hi all,

I was reading all 35 pages but is not clear to me if is really need it to remove the chip/chips from the motherboard.
One fact is clear that I cannot read the chip if is on the motherboard using CH341 programmer, because once I connect the wires to programmer, programmer is not recognized by the Windows unless I've attache the power supply to the motherboard I am reading the BIOS chip. Even that I am getting an error like chip is not recognized
Motherboard have a UC5 (25B64CYiG) and an UC6 (25B127DS1G) and UT6 (25Q80DVSIG)
I was trying to clip the UC6 (25B127DS1G) to CH341 but is not recognized. I was trying attaching wires and the same.

I am not sure CH341 is good enough to read the BIOS and post it here. Please share a better tool to do the job.

Model: Dell Latitude 5400
Reg typr No: P98G001
Board: EDC41LA-G891P
REV: 1.0 (A00)
SERVICE TAG: 7404yy2 or 74o4yy2 (not sure )

Thanks

[tatanachi]

Removed the admin password and disable absolute.

It worked, system's working fine! Thank you so much!

[rex98]

no more password but absolute is still enabled.

here flash both

[djesoric]

no more password but absolute is still enabled.

[rex98]

please help me remove password and disable absolute on my dell latitude 5400.thank you in advance.

Model: Dell Latitude 5400
Chip 8MB UC5: Winbond 25Q64JVIQ
Chip 16MB UC6: Winbond 25Q128JVSQ
MB: EDC41 LA-G891P Rev: 1.0 (A00)
S/T: 3xxhx33

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