Hi, first of all sorry if I write badly, but I use the translator,I accidentally killed my Lenovo Legion 5 15ACH6H laptop after flashing a wrong vbios to the Nvidia GPU, I did this because the GPU was already not working properly before he didn’t come recognized by Windows, and in desperation I did this and now I am very sorry. So now when I turn on the laptop it remains with a black screen, I can’t even enter the bios,I’ve already tried everything, changed thermal paste, cleaned the heatsink, disconnected the CMOS battery, but none of this solved the problem.The laptop was last rebooted in mux switch off, so it starts by force with the dGpu.
So I was wondering if there is a way to try to reset the bios to default settings, so that it starts with the iGpu, or if there is any other method I can try. Thanks
Mostelikely no, as certain variables in NVram volumes are not reset, start thinking in manualy dump and programming the SPI IC(s)
First search for Lenovo official recovery bios method if available for your system.
Hi thanks for the reply, but what I wanted to know can I at least try to flash the original bios to see if at least I can enter the bios and thus disable the Nvidia GPU? Because first of all this the laptop worked fine with the integrated cpu card… I saw that there are recovery tools to restore the bios and I was wondering if I could do it too, but I would have need a guide…
What would that mean? What did you flash to which chip?
I had flashed a vbios always of the RTX 3060, (R7 5800H cpu) but of another brand I think MSI, when I restarted the laptop in discrete gpu mode, the screen did not turn on anymore