[Solved] Trouble Flashing Lenovo Y50-70 4k

[limaxray]

I'm trying to mod the Insyde bios in my Y50-70 4k (remove white list, custom splash screen, enable hidden menus) but am having some trouble. I am using a combination of Andy's SLIC tool, IDA Pro, and a hex editor to do my hacks and build the rom, but this is my time so I'm not sure if I'm doing something wrong.

Anyway, when I try to flash using Windows tool (iscflash), it reboots into InsydeH2O and gives a 'Secure Flash/Invalid Firmware' error and doesn't flash. For the time being, I'm only trying to remove the white list, which only changes 2 bytes in the entire rom.

I've tried building the rom both using a backup image and using the downloaded update which didn't make a difference. I admit I'm a little confused about which one I should use and how I should flash it.

One thing I noticed is the backup image is exactly 64Mbits, while the downloaded update image is a bit longer. I opened the update in a hex editor to investigate and see the actual rom is prefaced with an executable ('MZ' are first 2 bytes, follow by a few k of machine code and string tables) and followed by what appears to be a cryptographic signature (I see the text 'Trust - Lenovo Certificate' and a bunch of seemingly random bytes). When I opened this image in the SLIC tool, I didn't receive a notice about encryption. Is it possible the built in update utility is verifying a signature before flashing?

I know other people were able to flash their Y50-70's without issue, so maybe I'm doing something wrong. My concern though is that since this is the newer 4k model, Lenovo may have subsequently locked down the updater. I am willing to pull the flash IC and program on the bench if needed, but obviously would rather not. Any suggestions on what I should do from here?

Thanks!

[BDMaster]

I'm trying to mod the Insyde bios in my Y50-70 4k (remove white list, custom splash screen, enable hidden menus) but am having some trouble. I am using a combination of Andy's SLIC tool, IDA Pro, and a hex editor to do my hacks and build the rom, but this is my time so I'm not sure if I'm doing something wrong.

Anyway, when I try to flash using Windows tool (iscflash), it reboots into InsydeH2O and gives a 'Secure Flash/Invalid Firmware' error and doesn't flash. For the time being, I'm only trying to remove the white list, which only changes 2 bytes in the entire rom.

I've tried building the rom both using a backup image and using the downloaded update which didn't make a difference. I admit I'm a little confused about which one I should use and how I should flash it.

One thing I noticed is the backup image is exactly 64Mbits, while the downloaded update image is a bit longer. I opened the update in a hex editor to investigate and see the actual rom is prefaced with an executable ('MZ' are first 2 bytes, follow by a few k of machine code and string tables) and followed by what appears to be a cryptographic signature (I see the text 'Trust - Lenovo Certificate' and a bunch of seemingly random bytes). When I opened this image in the SLIC tool, I didn't receive a notice about encryption. Is it possible the built in update utility is verifying a signature before flashing?

I know other people were able to flash their Y50-70's without issue, so maybe I'm doing something wrong. My concern though is that since this is the newer 4k model, Lenovo may have subsequently locked down the updater. I am willing to pull the flash IC and program on the bench if needed, but obviously would rather not. Any suggestions on what I should do from here?

Thanks!

HI friend,
actualy all UEFI Bioses are Signed and Write Protect so is not possible to use Original Flash Tool to
re-write Bios Mod into Eeprom, so can use if Intel CPU an powerful Intel tool FPT and if there is
error28 can try to use Svl7 prr.exe tool to bypss It !
So the Original Bios file is much different than Backup and You cannot use the Original Pure, but
have to get only Bios Region !
Let me know
Regards

Use this tool run It as Admin and upload here the result file :

http://rghost.net/58219938

[limaxray]

Here you go: https://www.sendspace.com/file/hxlzl5

[BDMaster]

Here you go: https://www.sendspace.com/file/hxlzl5

Ok friend,
download this Bios Mod and use It from Windows !!!
move modified folder into C: HD root place and open a Comand Prompt with
Admin Rights and get a CLI window then execute these comands :

cd \
cd modified
fptw.exe -f bios.bin -bios (for win7 32 Bits)

OR

fptw64.exe -f bios.bin -bios (for win7 64 Bits)


If You got errors then use Readme file to flash from USB Stick !

http://rghost.net/59906461

Let me know
Regards

[limaxray]

That worked perfectly, thanks!