Microsoft Surface laptop 4 UEFI password

[nobbie]

Hi,
I have a corrupted bios chip after an update.
If anyone has a dump I would be very grateful.
Model:
Microsoft Surface 4 (2021) Model 1950
Intel Core i5 11th Generation
512GB SSD
16GB Ram

Bios-Chip: W25R256JWPQ

S/N: 024302314457

Thank you

[silvertree]

I'm about to have a go at downloading the bios file from a Surface laptop 4 (1951), which is password locked at the bios level.
I'm interested in how you go about changing the bios file.
I've compared a few of the pairs of files above in HxD, and see that in every one a 3F has been changed to a 3C.

My question is, how do you know which 3F to change?

I suspect it is something to do with the serial number of the computer, but I am unable to find the serial number within the Hex file, and wonder what I'm doing wrong.
(Serial number of computer I'm about to work with is 025136421857)

I'd appreciate some insight please! Short of that, I might be back in a week or so with a file, for some direct help. 😊

Keen to understand - Thank you!

[Marcos Yanez]

I don't know, 2nd has volumes in Bios Region but if you don't have 2 identical readings it means you don't have a good bios backup.

oki, I just bought a microscope to ensure the pins are exactly well connected to have a good reading. Thanks for the help

[volinakis]

Oh , I understand now, thanks. There are differences...is the second bin also bad?

I don't know, 2nd has volumes in Bios Region but if you don't have 2 identical readings it means you don't have a good bios backup.

[Marcos Yanez]

compare readings, when you have 2 identical it means you have a good backup. The size is due to chipset, if programmer detected as being 256Mb will always generate a 33.554.432 bytes file. If you use HxD see tab "Analyse" and you have there "Compare"

Oh , I understand now, thanks. There are differences...is the second bin also bad?

[volinakis]

I tried again

compare readings, when you have 2 identical it means you have a good backup. The size is due to chipset, if programmer detected as being 256Mb will always generate a 33.554.432 bytes file. If you use HxD see tab "Analyse" and you have there "Compare"

[Marcos Yanez]

Thank you! I'm using a WSON8 chip probe pin adaptor. I did 3 readings and the file come always with the same size.

Can be the issue with the adaptor?

I tried again

[Marcos Yanez]

read again bios chipset, Bios Region has no volumes...

Thank you! I'm using a WSON8 chip probe pin adaptor. I did 3 readings and the file come always with the same size.

Can be the issue with the adaptor?

[volinakis]

First of all, I'm new to this, so please forgive any mistakes I may make.

I have a Surface Laptop 4 that's blocked with DFCI.


model Surface Laptop 4 / 1950 /
motherboard / M1098028-008 /
spi chip / WINBOND W25R256JWP


SN/050321323057

Any help will be really appreciated

read again bios chipset, Bios Region has no volumes...

[peste]

post merged..

[Marcos Yanez]

First of all, I'm new to this, so please forgive any mistakes I may make.

I have a Surface Laptop 4 that's blocked with DFCI.


model Surface Laptop 4 / 1950 /
motherboard / M1098028-008 /
spi chip / WINBOND W25R256JWP


SN/050321323057

Any help will be really appreciated

[abdulhashim]

Unlocked

Thank you!! its worked perfectly

[hoaca388]

hello

I need one help

this is surface laptop 4 1951 password locked
031721714057

thanks in advance

Unlocked

[abdulhashim]

hello

I need one help

this is surface laptop 4 1951 password locked
031721714057

thanks in advance

[hoaca388]

Please help to remove bios pass

Model Surface Laptop 4 1951

S/N: 018335122357

Thank you!

Here

[tataie]

Please help to remove bios pass

Model Surface Laptop 4 1951

S/N: 018335122357

Thank you!

[Simon Halley]

Try

darn it. unfortunately, neither of those worked. computer still has the exact same behaviour. i guess a bricked Surface machine is unfixable. thanks anyway, hoaca388. i will keep investigating the issue though. would love to see this computer working some day

[hoaca388]

Could anyone be able to provide me with a working bios? Windows logo for 10 seconds. Can't get past that. Is the laptop bricked? Anyone can help?

surface laptop 4 - 1951
mb rev - WAYLAND MB REV:3.0
sn - 033170714357

Try

[Simon Halley]

Could anyone be able to provide me with a working bios? Windows logo for 10 seconds. Can't get past that. Is the laptop bricked? Anyone can help?

surface laptop 4 - 1951
mb rev - WAYLAND MB REV:3.0
sn - 033170714357

[Akhlz001]

I`ll give you a clue, its in AWord on the first page of this thread

https://www.badcaps.net/forum/troubl...20#post3177920
https://www.badcaps.net/forum/troubl...post3178027

Thank you, I figured it out finally!