Enable discrete graphics card and restore Nvidia VBIOS?

Question

Iron

Good day, yesterday I tried to flash the VBIOS of my nvidia gtx970m video card on the msi gt72 2qd dominator laptop with the official firmware from the laptop support site, before that I had my own modified firmware, but unfortunately everything ended in failure after which the screen on the laptop refuses to turn on, that is, after pressing You can hear the buttons how everything works, the lights on the keyboard light up, but windows does not load, the screen is black - it is not turned on (it is not dark gray, as in black, but it is noticeable that even the backlight / brightness of the screen is not turned on). On my laptop there is a very bad feature, like on all laptops, graphics are discrete and built-in, but msi's have built in a button that switches them, that is, when you press it, you need to have the OS already running and standard laptop programs installed, As far as I understand, the SCM program (MSI system control center) is responsible for this button, immediately after pressing this program, this program displays a message box and says that there will be a reboot. There is another way - it works only in one direction, my video card is completely discrete and if I pull it out the system switches to the built-in intel The problem is that neither the system nor MNVFlash (Nvidia VBIOS recording program) sees the second video card. There is an old firmware so that to restore, you need to start either both video cards, or a system without a video card so that nvidia is visible somehow via remote desktop

Answer 1

the system may boot, but a video card with a crooked bios simply does not send a signal to the monitor, on stationary computers this issue was solved by creating a batch file that, when loaded, sews the bios from under the dos, and setting the bios to boot from external media.

Answer 2

Enable the onboard card in the BIOS. And until you put the system (drivers, etc.) in order, forget about the discrete one.

Answer 3

hahaha. Or maybe you want to reflash the mother's bios? To be sure