[QUOTE=Nazmul haque;n3567673]


bios extracted from Lenovo website update for Miix 720-12IKB Tablet (ideapad) - Type 80VV
DMI 2EE000 - 2EFFFF​ [ATTACH]n3567827[/ATTACH][QUOTE=Nazmul haque;n3567673]


bios extracted from Lenovo website update for Miix 720-12IKB Tablet (ideapad) - Type 80VV
DMI 2EE000 - 2EFFFF​ [ATTACH]n3567827[/ATTACH]...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

This specification for the Lenovo IdeaPad 720 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 720 boardview and 720 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo IdeaPad 720...

Hello.
i need schematics and boardview for lenovo ideapad 720 15IKB with the motherboard number : LB720 MB 16877-1M
thanks in advance

[B]Lenovo IdeaPad 720-15IKB Wistron Bohol LB720 LB721 16877-1[/B]...

Hi every one again i came here with one really intresting unclok of Lenovo ideapd MX11-12IKB MODEL which look exact microsft surface pro 4 . now i have 2 pad one i unlock with one removing bios chip read and send some one he give me unlock file it unlock ok without problem , now second one also lock but i am thinking to unlock it without remove bios so read dump with fptw64 i got bios region i am attaching file here could some one tell me where is password storeed? also can it possible to decrypt? also one intresting thing is here when i open this bios with uefi tool i got one module with name...

Re: Lenovo Ideapad MIIX 720-12IKB

@Maxpower3 (post #23)
[B]PwdUnlockChallengeVar[/B] = "Hint Code" or Unlock Key Hint Number, but on Lenovo laptops that have this code there must be a key stroke for this code to be shown on the screen, I haven't been able to find the keyboard key combination. Yes, PwdUnlockChallengeVar variable keeps changing every 3 incorrect passwords but never shown.



As for this screen capture of SaDataBase variables, it contains both SHA256 hashes, the first 16-bytes (128-bits) of "1234" and "4321"...

Re: Lenovo Ideapad MIIX 720-12IKB

PwdUnlockChallengeVar only displays after 3 bad tries
(ENTER key is not supported, text is required).
guid variable is deleted after changing password but the data is still written until the next lock

here are 3 different dumps
no password, 1234 and 4321 with also when locked
read with fpt...

Re: Lenovo Ideapad MIIX 720-12IKB



It looks a lot like that, doesn’t it?
Does anyone know how to do Fuji with this method?


GUID: SaDataBase 889CB747-7223-43EA-B198-AF2826E2AEB5
PwdUnlockChallengeVar 3F6E3B29-F842-4BA4-AE23-FF27C34F101C...

Re: Lenovo Ideapad MIIX 720-12IKB

@RethoricalCheese
I just find out, it's actually a SHA256 hash, but they only store the first 16-bytes (128-bits) into the SaDataBase variable. I've already verified this with a different manufacturer BIOS, I've checked hash from post #10 (extracted from Mybios.zip file) but couln't find a match so far, did found a match for post #1 file (password string is encoded as Unicode-16 prior to SHA256 hashing, passw0rd= 111111 <- put it in an hex file and calculate the SHA-256 hash like this: 310031003100310031003100).

Re: Lenovo Ideapad MIIX 720-12IKB

4F37C061F1854F9682F543FECB5EE9D6
password 1234

1234 -> MD5 and 02030405 (scancode) -> MD5 were not correct.

In my case, the password could be up to 64 bytes long so maybe has a trailing zero which needs to be taken into account.

Re: Lenovo Ideapad MIIX 720-12IKB

@schveky
There's no way to know what you will find, unless we have the motherboard schematic or unless you disassemble the laptop in order to find the BIOS chip.

I've seen this "SaDataBase" uefi variable before and the password hash it stores, I've been wanting to write a program to brute-force crack the password assuming this is a MD5 hash and also assuming that it will be an easy password (max. 6 characters). I've even asked a friend with a laptop with a similar BIOS to set a known password and to provide a BIOS dump...

Re: Lenovo Ideapad MIIX 720-12IKB

@AAAC
Tank you for reply. To be honest, I was expecting a simpler answer, because decoding the Miix520 BIOS password sounded like peace of cake, comparing to things you wrote. If I open my device, is it neccessery tho unsolder the BIOS chip in order to write a new BIOS file to it? Or, I can use a EEPROM programmer with a cliping tool, so no need for removing the chip? I was thinking if I remove the main laptop battery and CMOS battery, wait one day, than attach programmer via included clip......

Re: Lenovo Ideapad MIIX 720-12IKB

@schveky
This BIOS is different, as far as I know the password is stored as a 128-bit hash (MD5?) in "SaDataBase" UEFI variable.
So the first thing to do is to reverse engineer the driver(s) writing to this variable in order to determine if the code is hashing the password as an ASCII string, scan-codes of the password or other, then you could try to brute force crack it, maybe even build a sort of rainbow table so you could decode the passwords immediately.

Re: Lenovo Ideapad MIIX 720-12IKB

Is there anybody who is familiar with this model of Lenovo? Ideapad Miix 720-12IKB ? There was so many people who knows Miix 520...
I need offset in the BIOS dump oppened with hex editor, where the BIOS password is located.

Re: Lenovo Ideapad MIIX 720-12IKB

Change .cap to .bin, open .bin file with hxd editor, cut off excess parts of the file, mostly based on experience.

Re: Lenovo Ideapad MIIX 720-12IKB



Thank you hoaca388 for your effort! How you took out the "virgin bios file" from *.cap file?...

Re: Lenovo Ideapad MIIX 720-12IKB



I am not intending to write to the BIOS chip. I was hoping that someone can locate the password in my BIOS file, just like they did in lenovo miix 520 topic. After locating it one can decode it using scancodes. After that accesing the BIOS is simple (using decoded password)....