Lenovo thinkBook 14 g3 ACL Bios password. HELP!

[shiyab]

help to fix bios password, already test with patch but not working
SN : MP25LBYH
ThinkBook 14 G3 ACL Laptop - Type 21A2
attach : EC and Main bios
thanks

HI try
flash main file

[andresi]

HI try
flash main file

thanks working but SN need to rewrite

[usagi938474]

Hello, can you help me remove the BIOS password on my Lenovo ThinkBook 14 G3 ACL? Could you tell me what files I need to provide besides a copy of the BIOS?

[shiyab]

Hello, can you help me remove the BIOS password on my Lenovo ThinkBook 14 G3 ACL? Could you tell me what files I need to provide besides a copy of the BIOS?

post backup bios password bin

[usagi938474]

post backup bios password bin

S/N: MP27L8EH

[hoaca388]

S/N: MP27L8EH

Your BIOS file is only 9.2KB after compression; you may have misread the chip

[usagi938474]

Your BIOS file is only 9.2KB after compression; you may have misread the chip

Can I send a file in ZIP format with minimal compression instead of RAR format ?

[SMDFlea]

Can I send a file in ZIP format with minimal compression instead of RAR format ?

The file that you posted is 256KB uncompressed. The file looks like it is for the PD firmware , possibly a realtek chip. Find the bios chip it`s hiding somewhere

[usagi938474]

The file that you posted is 256KB uncompressed. The file looks like it is for the PD firmware , possibly a realtek chip. Find the bios chip it`s hiding somewhere

Can I have an image or a type of chip? Perhaps I washed the wrong thing.

[SMDFlea]

Can I have an image or a type of chip? Perhaps I washed the wrong thing.

W25Q256JW or W74M25JW 1.8V so you will need a 1.8V adapter if your programmer doesn`t have that voltage option and the chip is WSON8 ,you will need to desolder it, then put it in or onto a WSON adapter board or use a WSON pogo adapter or solder wires. I don`t know the location of the chip on the board.

[usagi938474]

W25Q256JW or W74M25JW 1.8V so you will need a 1.8V adapter if your programmer doesn`t have that voltage option and the chip is WSON8 ,you will need to desolder it, then put it in or onto a WSON adapter board or use a WSON pogo adapter or solder wires. I don`t know the location of the chip on the board.

I find 25LR256EYI on my motherboard. May i use a ch341 programmer with 1.8v adapter to read dump from this chip?

[SMDFlea]

yes you can.

[usagi938474]

Good day, I apologize for the very late reply, but could you help me unlock the BIOS?
S/N: MP27L8EH

[Sparo]

Good day, I apologize for the very late reply, but could you help me unlock the BIOS?
S/N: MP27L8EH

Hi The size of the compressed backup file is wrong (565.7KB)
Read the chip again and make sure to create a GOOD backup (make 2-3 backups and compare them to ensure they're identical before posting)

[usagi938474]

Hi The size of the compressed backup file is wrong (565.7KB)
Read the chip again and make sure to create a GOOD backup (make 2-3 backups and compare them to ensure they're identical before posting)

But the file itself weighed 32 megabytes before compression, which seems to be the correct size

[Sparo]

But the file itself weighed 32 megabytes before compression, which seems to be the correct size

Exactly 32MB of actual valid data wouldn't compress to ~500KB Otherwise someone would be winning a Nobel Prize for solving data storage
Compression works by finding repeating patterns so The reason your file compresses that much is because it's full of repeating/empty data (like FF)
This means the BIOS dump is bad (not a valid dump) i.e. full of garbage data (FF/00) etc

[usagi938474]

Exactly 32MB of actual valid data wouldn't compress to ~500KB Otherwise someone would be winning a Nobel Prize for solving data storage
Compression works by finding repeating patterns so The reason your file compresses that much is because it's full of repeating/empty data (like FF)
This means the BIOS dump is bad (not a valid dump) i.e. full of garbage data (FF/00) etc

I think it worked—you can check it out

[Sparo]

I think it worked—you can check it out

It's much better that's almost the right size but imo it's still a bad read (I'm judging from its contents)
I have an unlocked file I could give you to try but I don't want you to risk bricking your laptop without having a good backup first
Here's my advice: Make 2–3 backups and compare them to ensure they're identical. That way You know you've made a good backup before posting
In order To compare the files you can simply check their hashes OR use the built-in fc.exe command (Function) OR use a hex editor like HxD (Tools > Compare)