Bios unlock for DELL LATITUDE 7420

[Julian Bailey]

Hi all

Is anyone able to remove the admin / BIOS password for the attached please?

Many thanks

[peste]

merged post..

[peste]

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

[Julian Bailey]

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

Hi, info below.

Service tag: 28SH0F3
Make / Model: Dell Latitude 7420
Motherboard is an i5 11th Gen, 8GB RAM

Many thanks

[shiyab]

Hi all

Is anyone able to remove the admin / BIOS password for the attached please?

Many thanks

this no chek

[Julian Bailey]

this no chek

What do you mean sorry?
Thanks

[lapfix]

Hi all

Is anyone able to remove the admin / BIOS password for the attached please?

Many thanks

this is not the bios...search for another chip writen on 256

[Markus1741]

What do you mean sorry?
Thanks

Hello you need WSON8 chip under Intel WiFi card the place called UC2
You upload the Thunderbolt chip content.

[Julian Bailey]

Hello you need WSON8 chip under Intel WiFi card the place called UC2
You upload the Thunderbolt chip content.

Ahhh, sorry, searched online and it said the bios chip was to the left of the WWAN slot!

Will take a look later!

Cheers

[mirceaflorin]

Hello! Please help me to unlock this bios dump.
Dell Latitude 7420
GDC31 LA-K371P rev 3.0 A02
Service tag CYY3QN3
Thank you!

[Julian Bailey]

Hello you need WSON8 chip under Intel WiFi card the place called UC2
You upload the Thunderbolt chip content.

Ok so Ive pulled the BIOS off the BIOS chip by UC2, see attached.

If someone can take a look and unlock it that would be great.

Service tag: 28SH0F3
Make / Model: Dell Latitude 7420
Motherboard is an i5 11th Gen, 8GB RAM
Motherboard model: GDC31 LA-K371P Rev:3.0 (A02)

Thanks

[Markus1741]

Ok so Ive pulled the BIOS off the BIOS chip by UC2, see attached.

If someone can take a look and unlock it that would be great.

Service tag: 28SH0F3
Make / Model: Dell Latitude 7420
Motherboard is an i5 11th Gen, 8GB RAM
Motherboard model: GDC31 LA-K371P Rev:3.0 (A02)

Thanks

Sorry but your uploaded file is corrupt try again ...

[Julian Bailey]

Sorry but your uploaded file is corrupt try again ...

hmmm, the BIOS chip is a 25R256JVEN but my CH341A programmer only has 25Q256BV and 25Q256FV as an option when it detects the chip. Could this be the issue?



Thanks

[shiyab]

Ok so Ive pulled the BIOS off the BIOS chip by UC2, see attached.

If someone can take a look and unlock it that would be great.

Service tag: 28SH0F3
Make / Model: Dell Latitude 7420
Motherboard is an i5 11th Gen, 8GB RAM
Motherboard model: GDC31 LA-K371P Rev:3.0 (A02)

Thanks

hi try unlock

[Markus1741]

What is the point of creating an unlock file from a corrupted BIOS?
And then probably with deleting 000F100 – 000F4FF0 (h): 4000
Why not with 00FDAA 00FC00
I know on YouTube ********** offers an .exe that does this automatically.
I also know that it works on a Dell 5400, but it doesn't work on many newer models.
If the user writes this file to his notebook he cannot use it and it will no longer start.
Maybe SMDFlea should please take a look at this kind of behavior.

[Markus1741]

hmmm, the BIOS chip is a 25R256JVEN but my CH341A programmer only has 25Q256BV and 25Q256FV as an option when it detects the chip. Could this be the issue?



Thanks

Hello I assume you are using the original software from ch431a, but try Neoprogrammer or ASProgrammer, both are better.

[Julian Bailey]

Hello I assume you are using the original software from ch431a, but try Neoprogrammer or ASProgrammer, both are better.

Thank you I will give them a go, but I think the chip is corrupt or died. It reads but takes a long time and when I write a bios to it (even the original) it comes with a verify error 😔