Lenovo Legion PRO 5 16IRX8, i9+RTX4070

[hardware1]

The laptop powers on briefly and then shuts down.
After checking all voltages on the motherboard and confirming they were fine, I suspected a BIOS issue.

Unfortunately, during the BIOS read process, I mistakenly clicked "Erase" and ended up overwriting the GPU BIOS.

Okay, here is your new BIOS, it' a virgin BIOS from Lenovo with your DMI and Windows Key.
Also the vBIOS is there but you have to make it fit to your chip using any hex editor.

[hardware1]

The vBios is available at Lenovo support - https://pcsupport.lenovo.com/us/en/p...7-265289D96F6F

https://download.lenovo.com/consumer...ios_update.zip

Extract the exe from the zip file ,if the laptop is booting from uma just run the exe. If not then extract using the command line. Make a new folder on your C: drive called TDK ,put the exe into that folder ,run the command as Admin

cd C:\TDK

legion_y9000p_irx8_rtx4070_vbios_update.exe /ext

The rom file Y780-RPL_GN21-X6_Base55W_Max140W_0010_775_2_gsync__95.06.1E.00.98_PP.rom can be padded out with FF`s to whatever the chip size is using a hex editor. What size is the chip ?

.

Great, I didn't expect to find a vBIOS on Lenovo website before.
I extracted the rom file easily by running "legion_y9000p_irx8_rtx4070_vbios_update" then get it from %temp% folder.
Most of the time when I found a vBIOS posted online, it's always smaller than the chip size by a few bytes. For an example this one is 2000KB (1F4000h) but I think the chip will be 2048KB (200000h). Also when I compare between the 2 files, I found the extra length in the original dump filled by 00`s, maybe the programmer is doing this by itself.