Read EC NPCX997 Lenovo T14 Gen 4

[vanminhscdt@gmail.com]

I can't read EC Npcx997, device not found

Can anyone help me?
Where did I go wrong or what else am I missing to read it?

Lenovo T14 Gen 4
S/N :PF4YA55W
M/B : NM-F261 RE 1.0

Thank

[reformatt]

Don't have the schematic as it's behind a paywall. Did see a block diagram though, looks like this chip isn't programmable and gets it's code from a 256MB SPI flash chip.

[vanminhscdt@gmail.com]

Don't have the schematic as it's behind a paywall. Did see a block diagram though, looks like this chip isn't programmable and gets it's code from a 256MB SPI flash chip.

Someone in the SVOD group has read it.
I did the same but it didn't work.
Or maybe the ARM core feature hasn't been unlocked yet so it can't be read.

[Kodza]

I can't read EC Npcx997, device not found

Can anyone help me?
Where did I go wrong or what else am I missing to read it?

Lenovo T14 Gen 4
S/N :PF4YA55W
M/B : NM-F261 RE 1.0

Thank

Hi Vanminhscdt did you manage to read NPCX997, I am also trying with SVOD 4 but no luck

[fighter158]

Hi Vanminhscdt did you manage to read NPCX997, I am also trying with SVOD 4 but no luck

This NPCX997 no need progamming. They have 128Mbit - 16MB bios chip for EC. If you need remove password, you need rebuild main BIOS. Its 512Mbit - 64MB. All Amd bios is 1,8V

First you need make backup your main bios. For SVOD you must add some informatin to file spi25.dat in svod program folder. I pfefer Notepad ++ running in Admin mode for saving with admin privileges. So add this EF6020,WINBOND,W25R512,4000000,4,0,1 to end of file and save. Run the Svod sw and now they can 512Mbit chip read/write and make backup with 1,8V Power.



If is Used RT809F latest SW is a necessity. Version 20250903 is latest now and working perfect.



From your backup bios you need windows key only. Open backup bios in HxD editor and Ctrl+F - hex-values EF 82 3D 00 00 00 03 00 07 00 00 00 01 - the start win data. Then keys Ctrl + E Length 7D and Ctrl + C for copy.



In new bios file in Blank.rar is place for win in Offset 318F163 - Crtl + G and go to....



Data copied in clipboard add to new with Ctrl + B and save to your work directory.

Write BIOS and lead back to motherboard. After some restart is BIOS Self Healing backuped from EC bios without Password.



After boot to bios set time. I recomend install latest bios for update all components

[-yan]

fighter158 thank you for the detailed instructions, unfortunately this didn't work for me. After BIOS Self Healing the supervisor password is still in place.

[-yan]

I could be wrong, but it seems like the EC chips that can be read are ΝPCX997ΚAΑΒΧ, and the ones that don't work are ΝPCX997ΚAΑΒ.