You need to extract a clean BIOS ROM ( "clean" = without any system-specific settings ) from a BIOS update utility. Try to open this utility (called something like "winflash_3.00.exe") as an archive with 7zip, and extract the contents of this .exe file using 7zip. If successful, it would give you a set of files, one of which might contain this clean BIOS ROM. Could be called something like WinVALGC300.bin ( you could guess it by looking at the file sizes ). Then open this file using a hexedit, search for $_IFLASH_BIOSIMG header. Not directly after but slightly further after this header, at the closest address ending by 0 (rounded by 0x10) there is a start of BIOS section, the size of which should be equal to a size of your BIOS chip. Copy-paste it into a new binary file, then you could try using it (but only after making a backup of your current chip contents!). You could also compare the contents of your original ROM image vs this "clean" image, to get an idea where a password might be stored (could be encoded instead of a plain text).
On Thu, Aug 15, 2019 at 4:27 PM Darko Svilkovic darko.svilkovic2@gmail.com wrote:
Hi,
Yes flashed with a windows update tool,which automaticly updates,has no download ...
Any help which program tu use to download the bios ...
Read somthing like there are 2 chips for bios (one for bios and the other for password and settings) ...
thx
On Thu, Aug 15, 2019 at 2:28 PM Mike Banon mikebdp2@gmail.com wrote:
"I have flashed the bios to a new version" - how you did that, using a windows tool provided by a laptop manufacturer? If yes, then it preserves the originally set password and maybe the other settings. Try to extract a "clean" BIOS image from the BIOS update utility provided by a laptop manufacturer. Then, using a flashrom-supported programmer like USB CH341A with a test clip (SOIC8 ?) together with our flashrom opensource tool, you might be able to flash a clean BIOS image (without any passwords/settings) into your BIOS chip. Of course please make a backup before flashing a new image, in the case it's incorrect or you'd need to borrow some Intel ME-related regions or to have a MAC address specified in your ROM in order for onboard Ethernet working.
On Wed, Aug 7, 2019 at 12:01 PM Darko Svilkovic darko.svilkovic2@gmail.com wrote:
hi,
Hawe a problem with lenovo c540 AIO,bought this from a second hand,and didn't see,and he didn,t mention that there is a bios admin pass ...
I have flashed the bios to a new wersion,taked out the cmos battery,jumpered the cmos jumper but with no success ...
Now i heard that the password is in eeprom ...
How to remowe it ???
thx
Darko/Croatia _______________________________________________ flashrom mailing list -- flashrom@flashrom.org To unsubscribe send an email to flashrom-leave@flashrom.org