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Old 12-04-2017, 10:00 AM   #1
zaleon
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Smile Microsoft Surface Pro 4 UEFI Unlock Request

Hello,

Can someone please take a look at my BIOS dump for my Surface Pro 4 and see if they can remove the password?

I dumped it using the FPTW64 -d bios.bin -BIOS command, so hopefully that is correct.

Thanks!
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File Type: zip Surface_Pro_4.zip (3.42 MB, 41 views)
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Old 12-05-2017, 01:18 AM   #2
imranromi
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Default Re: Microsoft Surface Pro 4 UEFI Unlock Request

Quote:
Originally Posted by zaleon View Post
hello,

can someone please take a look at my bios dump for my surface pro 4 and see if they can remove the password?

I dumped it using the fptw64 -d bios.bin -bios command, so hopefully that is correct.

Thanks!
no the bios is corrupt i think this board bios chip size 16mb you send 10mb.read and save again.
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Old 12-05-2017, 04:14 PM   #3
zaleon
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Default Re: Microsoft Surface Pro 4 UEFI Unlock Request

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Originally Posted by imranromi View Post
no the bios is corrupt i think this board bios chip size 16mb you send 10mb.read and save again.
Hi imranromi, thanks for your reply. I've been trying all day but the FPT program refuses to output more than the 10240kb as shown in the attached screenshot. FPT reads the total size of the BIOS as 16384kb as you say but when I run the dump command it just not pulling all of it.

I've also been unable to find another BIOS backup tool that works on Windows 10 and the Surface Pro 4.

Any ideas?
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Old 12-06-2017, 03:58 AM   #4
imranromi
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Default Re: Microsoft Surface Pro 4 UEFI Unlock Request

If you remove bios password open laptop find bios chip and use bios programmer read and bkup upload the file. I try remove inside the bios file password.when bkup bios 16mb file need.
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Old 12-06-2017, 05:28 AM   #5
rioreno
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Default Re: Microsoft Surface Pro 4 UEFI Unlock Request

Quote:
Originally Posted by zaleon View Post
Hello,

Can someone please take a look at my BIOS dump for my Surface Pro 4 and see if they can remove the password?

I dumped it using the FPTW64 -d bios.bin -BIOS command, so hopefully that is correct.

Thanks!
1. To get fulldump 16mb ,try without -BIOS : FPTW64 -d bios.bin
2. To makesure your 10mb dump can be flashing back with FPTW without failed.. please trying flash back your dump... if it successfully flashing back with FPTW , i"ll remove the password from your 10mb
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Old 12-06-2017, 07:35 AM   #6
zaleon
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Cool Re: Microsoft Surface Pro 4 UEFI Unlock Request

Quote:
Originally Posted by rioreno View Post
1. To get fulldump 16mb ,try without -BIOS : FPTW64 -d bios.bin
2. To makesure your 10mb dump can be flashing back with FPTW without failed.. please trying flash back your dump... if it successfully flashing back with FPTW , i"ll remove the password from your 10mb
Hi, thanks for your reply. I have tried without the -BIOS before and it complained it couldn't read that flash area or something to that affect.

I believe after writing to another member here with the same issue, that iamromroni is correct and the only way to get the full dump is to open up the tablet and read it using a physical programmer.

However, the Surface Pro 4 from what I've read is extremely difficult and time-consuming to get into without damaging it, so I'm not willing to go that far as long as my Windows is still working. I appreciate your assistance in trying to resolve this issue. This is a great forum!
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Old 03-29-2018, 01:07 PM   #7
reverendalc
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Default

Quote:
Originally Posted by zaleon View Post
Hi, thanks for your reply. I have tried without the -BIOS before and it complained it couldn't read that flash area or something to that affect.

I believe after writing to another member here with the same issue, that iamromroni is correct and the only way to get the full dump is to open up the tablet and read it using a physical programmer.

However, the Surface Pro 4 from what I've read is extremely difficult and time-consuming to get into without damaging it, so I'm not willing to go that far as long as my Windows is still working. I appreciate your assistance in trying to resolve this issue. This is a great forum!
did you ever get anywhere with this?

not only do you have to open the surface (which is a chore), but you have to remove the chip because it's WSON style and cannot be connected in situ.

at any rate, I have a cleaned dump for surface pro 4 from a previous job, and i'm currently trying to find a way (using software) to flash this clean dump instead of opening this one up and pulling the chip.

FWIW, using the ROL securebootdebug policy, i've been able to launch an EFI shell. i can't seem to figure a way to flash the eeprom from the EFI shell, and MS doesn't offer an EFI firmware update utility like many other vendors do.
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Old 03-29-2018, 04:08 PM   #8
zaleon
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Default Re: Microsoft Surface Pro 4 UEFI Unlock Request

No, I never got anywhere with it as far as unlocking the BIOS. Other than that it worked fine in Windows, but I ended up not using it very much and sold it to someone else on eBay.

The BIOS is pretty limited in settings you can adjust anyway on those devices. So you aren't missing much even if you are locked out of it, basically just secure boot. I think if I get another device in the future it will be a regular laptop.
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